What assets cannot be touched in a divorce?

Separate property is generally not divided. That includes assets owned before marriage, gifts and inheritances received during marriage, and earnings and accumulations after the date of separation. For IP, the answer turns on when the asset was created or acquired compared with those dates, and tracing records establish its character.

Can my spouse claim a share of my patent or copyright in a California divorce?

Generally yes, if the invention or work was created during the marriage. Family Code § 760 presumes property acquired during marriage is community, so the other spouse has a claim to its value. IP with documented pre-marital or post-separation origins is generally separate, though growth during marriage can still create a community share.

How is intellectual property valued in a California divorce?

Appraisers usually use the income approach, the market approach, or the cost approach. The income approach is most common for IP with steady royalties. The market approach relies on comparable deals, and the cost approach estimates replacement cost. Contested cases typically involve forensic accountants or IP valuation professionals, and the court may appoint its own expert.

What happens to royalties after a divorce is final?

Royalties from community IP may keep being divided as they arrive, unless the judgment used a lump-sum buyout or set other terms. If a royalty stream was never addressed, Family Code § 2556 lets the court divide it after judgment. Royalties from post-separation work are generally the creating spouse's separate property.

Can my wife or husband touch my LLC in a divorce?

The question is less about the LLC and more about the value inside it. If the company was formed during the marriage, or grew because of community effort, the community has a claim to that value. IP held inside an LLC goes through the same characterization, tracing, and Pereira or Van Camp analysis as IP held personally.

What is the biggest mistake people make with IP in a divorce?

Leaving IP off the Schedule of Assets and Debts (FL-142) is one of the most serious. The disclosure duties under Family Code § 2100 and the sections after it cover all assets, including trade secrets and pending applications. Settling on an unsupported value, without qualified valuation work, is another common source of lopsided outcomes.

Are trade secrets protected during divorce proceedings?

Trade secrets must be disclosed as assets, but the court can protect how that happens. San Diego Superior Court can issue protective orders, including attorneys' eyes only designations, that limit access to counsel and experts. Those orders are usually put in place before the underlying information is produced.

Does it matter when a patent was filed versus when the invention was conceived?

Yes. Courts generally look at when the invention was conceived and reduced to practice, not only when the application was filed. An invention conceived during marriage is generally community even if the filing came after separation. Lab records, invention disclosures, and prosecution history are the key evidence.

Intellectual Property in Divorce: CA Patents & Royalties

In a California divorce, a patent, copyright, trademark, or trade secret created during the marriage is generally community property, owned equally by both spouses. IP created before marriage or after the date of separation is generally separate property. The hard questions are when the work began, what it is worth, and how to divide something that cannot be cut in half.

Most people facing this question are not asking in the abstract. They might be a founder in Sorrento Valley whose company's value sits in a patent family. They might be an engineer in Kearny Mesa with inventions assigned to an employer but royalties still coming in, or a songwriter or software developer whose catalog pays every quarter. Some are the spouse of that person, watching an income stream they helped support and wondering whether any of it is theirs. Either way, the reader is holding an asset with no deed and no account statement, and is trying to understand how a family court will even see it.

This article walks through the chain a San Diego County court follows: what the asset is, who owns it and when it arose, how it is characterized, how it is valued, how tracing works, and what division and support look like afterward.

What Intellectual Property Is — and Why Divorce Courts Treat It Differently

Intellectual property, or IP, is a legal right in something the mind produced. Four categories come up most often in divorce.

A patent is a government-granted exclusive right to make, use, and sell an invention for a set period. A trademark is a brand identifier, such as a name, logo, or slogan, that tells buyers who stands behind a product. A copyright protects an original creative work fixed in some form, including code, music, books, film, photography, and architectural drawings. A trade secret is confidential business information, like a formula, process, or customer compilation, that has value because competitors do not know it.

Around those four sit the money-producing arrangements. A royalty is a payment made each time a work or invention is used or sold. A licensing agreement is a contract that lets someone else use the IP in exchange for fees.

What makes IP different from a house or a brokerage account is that it is intangible. There is no county recorder entry showing ownership of a trade secret. A copyright exists the moment a work is created, whether or not it is registered. Identification is not routine, and neither is valuation. Two qualified appraisers can look at the same patent and reach numbers far apart.

IP also tends to keep paying. A licensed patent or a song catalog can generate income for years after the judgment. That creates two problems at once: what is the asset worth today, and who gets the checks that arrive later.

In San Diego County, these questions are not rare. The biotech corridor around Torrey Pines and UTC, defense technology firms near Kearny Mesa and Miramar, software companies, and a large creative community all produce IP. For households in these industries, IP is often one of the largest assets in the complex property division of a high-asset case.

California Community Property Rules and How They Apply to IP

California starts with a presumption. Family Code § 760 provides:

"Except as otherwise provided by statute, all property, real or personal, wherever situated, acquired by a married person during the marriage while domiciled in this state is community property."

IP is personal property. So an invention, a manuscript, or a brand built during the marriage generally belongs to both spouses, regardless of whose name is on the filing.

The counterweight is Family Code § 770. Separate property includes "all property owned by the person before marriage," all property acquired during marriage "by gift, bequest, devise, or descent," and "the rents, issues, and profits" of that property. A catalog inherited from a parent, for instance, is generally separate, much as with any inheritance in a California divorce.

For IP, the controlling question is timing. When was the work created or the right acquired? If the answer is "during the marriage," the starting point is community.

The end of the marriage, for property purposes, is the date of separation. Family Code § 70 defines it as "the date that a complete and final break in the marital relationship has occurred," shown by both an expressed intent to end the marriage and conduct consistent with that intent. The court considers "all relevant evidence." In IP cases, this date is often contested, because a few months can decide whether a major invention belongs to one spouse or two.

Each IP type applies the rule a little differently:

Patents. An invention conceived and applied for during marriage is generally community property, even if the patent issues after separation or after the divorce. The right traces to the inventive work, not the issue date.
Copyrights. A work created during marriage is presumptively community. Royalties it earns after the divorce may remain community income, depending on when the underlying work was done and how the judgment treats the stream.
Trademarks. Goodwill and recognition built during marriage are community. A mark established before marriage may be separate, but its growth during marriage can raise tracing arguments, and title changes can raise transmutation questions. Transmutation means a change in an asset's character by agreement between spouses.

Title matters too. Under Family Code § 2581, property acquired during marriage in joint form is presumed community for division purposes. That presumption can be rebutted only by a clear statement in the title document or a written agreement that the property is separate. IP held in both names, or in a jointly owned entity, starts from that presumption.

The Separate Property Exception: Tracing Pre-Marital and Post-Separation IP

Tracing is the process of following an asset back to its source with records. The spouse claiming separate property carries the job of proving it. Memory and testimony alone often fall short. Documents usually decide these disputes.

Pre-marital IP is the simplest case in theory. A patent filed, copyright created, or trademark established before the wedding is separate property. The complication is growth. If the owner spent the marriage working on that asset, improving it or licensing it or building a business around it, the community may share in the increase.

California courts use two methods to split that increase.

Pereira v. Pereira (1909) 156 Cal. 1. Under the Pereira approach, the court gives the separate property owner a fair rate of return on the original value of the asset. Everything above that return is treated as the product of community effort and goes to the community. Pereira tends to be used when the owner's personal work drove the growth.

Van Camp v. Van Camp (1921) 53 Cal.App. 17. The Van Camp approach runs the other direction. The court figures out what reasonable pay for the spouse's work would have been, credits the community with that pay less what the family already received, and leaves the rest of the growth as separate property. Van Camp tends to fit when growth came mainly from the asset itself or from market forces.

Courts have discretion to choose whichever method achieves substantial justice on the facts. The choice can move a large number from one column to the other.

Post-separation work sits on the other side of the line. Family Code § 771 states that "the earnings and accumulations of a spouse … after the date of separation of the spouses, are the separate property of the spouse." An invention conceived and built after separation generally belongs to the inventor alone.

Mixed-character IP is where most real disputes live. An invention may have been sketched before the marriage, reduced to practice (meaning built or proven to work) during it, and commercialized after separation. Each stage can carry a different character, and the court may apportion value among them.

The evidence in these cases is specific:

Lab notebooks and invention disclosure forms
Version control logs and commit histories for software
Copyright registration dates and drafts with metadata
Patent prosecution history, including provisional filings
Trademark application dates and first-use evidence
Employment and assignment agreements

For someone who has spent years building the work, having its history reduced to timestamps can feel strange. Those timestamps are, in practice, the whole argument.

Valuing Intellectual Property: Why Standard Appraisal Methods Don't Always Work

Once character is settled, the next question is price. Valuation professionals use three main approaches.

The income approach estimates the present value of future income, such as royalties or license fees. Present value means what a future stream of money is worth in today's dollars. This approach is the most common for patents and copyrights with an established payment history. It requires two contested choices: a projection of future income and a discount rate, which is the rate used to reduce future dollars to today's value for risk and time. Small changes to either can swing the result a great deal.

The market approach looks at what comparable IP sold or licensed for. The trouble is that licensing deals are often confidential. True comparables are hard to find, and experts argue over whether a given deal is really similar.

The cost approach asks what it would cost to recreate or replace the IP. It is useful for early-stage or internal-use assets. For commercially successful IP, it often understates value, because a hit song or a blockbuster patent is worth far more than it cost to make.

In contested cases, forensic accountants and IP valuation professionals typically do this work, and each side may retain its own. When their conclusions are far apart, Evidence Code § 730 allows the court, "on its own motion or on motion of any party," to "appoint one or more experts to investigate, to render a report … and to testify." The court may also set that expert's compensation.

San Diego's economy adds its own difficulty. A biotech patent from a Torrey Pines lab may be worth very little before clinical data and a great deal after regulatory approval. Software IP in UTC or Sorrento Valley depends on market adoption that may not have happened yet. Valuing an asset whose worth turns on an uncertain future event is one of the harder problems in family law. Equity compensation raises a similar issue, discussed in our article on stock options and divorce.

Royalty streams can be handled two ways. A pay-as-you-go approach divides each payment as it arrives. A capitalized approach converts the expected stream into a lump-sum value and divides that now. Pay-as-you-go shares the risk that income rises or falls. A lump sum offers a clean break but rests on a forecast. Each carries tax and practical consequences, which is why tax counsel is usually part of these decisions.

Dividing IP in Practice: Assignment, Licensing, and Buyout Structures

A bank account can be split to the penny. A patent cannot be cut in half without damaging what makes it valuable. So community IP is usually divided through structure, not surgery.

Three structures are common:

One spouse keeps the IP and the other receives an offset. The keeping spouse pays an equalizing payment or gives up other assets of equal value.
Co-ownership with a written agreement. Both spouses stay owners, bound by a licensing or revenue-sharing contract.
Sale to a third party. The IP is sold and the net proceeds are divided.

Co-ownership sounds fair but carries real risk. Under federal patent law, 35 U.S.C. § 262, each joint owner of a patent may make, use, sell, or license the invention without the other's consent and without accounting to the other, absent an agreement. Former spouses who share a patent can end up competing with it. Copyright raises a similar concern. Under the joint works framework defined in 17 U.S.C. § 101, co-owners generally may each use and license the work, subject to a duty to account for profits. Divorce judgments that leave IP co-owned usually need detailed contract terms to prevent conflict.

Trademarks are the most fragile. A mark exists to tell consumers there is a single source behind a product. Split ownership can create confusion and may weaken or put the mark at risk. Courts and practitioners generally prefer outcomes where one spouse owns the trademark outright.

In practice, the creating spouse usually wants to keep the IP and offset its value against other assets, such as real estate in divorce, retirement accounts, brokerage holdings, or cash. That is where the valuation fight matters most, since the offset is only as fair as the number behind it. These cases are heard in San Diego Superior Court's family law courts, and complex IP disputes may involve evidentiary hearings with expert testimony.

Trade Secrets, Confidential Business Information, and Divorce Proceedings

California defines a trade secret in Civil Code § 3426.1, part of the California Uniform Trade Secrets Act. A trade secret is information, "including a formula, pattern, compilation, program, device, method, technique, or process," that:

"(1) Derives independent economic value, actual or potential, from not being generally known to the public or to other persons who can obtain economic value from its disclosure or use; and (2) Is the subject of efforts that are reasonable under the circumstances to maintain its secrecy."

That definition sets up a real tension. A trade secret's value depends on staying secret. Divorce depends on disclosure.

California's disclosure law is broad. Family Code § 2100 and the sections that follow require "a full and accurate disclosure of all assets and liabilities in which one or both parties have or may have an interest," early in the case and "regardless of the characterization as community or separate." Each spouse also has a continuing duty to update that disclosure. A trade secret owned by a spouse or a spouse's company is an asset. It has to be disclosed.

What can be protected is the form of disclosure. San Diego Superior Court can issue protective orders that limit who sees sensitive material. A common tool is an "attorneys' eyes only" designation, which lets counsel and retained experts review the information while keeping it from the other spouse personally and out of the public file.

Valuing a trade secret without spreading it takes planning. The expert engagement, the protective order, and the handling of reports and exhibits are usually settled before anyone opens the underlying files. For the owner, this is often the section of the case that feels most exposed. For the other spouse, it can feel like being asked to accept a number they cannot see behind. A well-built protective order is meant to address both concerns.

What Happens to Royalties and Licensing Income After Divorce

A signed judgment does not stop royalty checks. What happens to them depends on how the underlying IP was characterized.

If the IP itself was community property, royalties it produces after divorce may remain divisible as they arrive. That holds unless the parties agreed otherwise or the court ordered a lump-sum division. A song written during the marriage can pay both former spouses for decades under a pay-as-you-go arrangement.

Sometimes a royalty stream is simply missed. Family Code § 2556 gives the court "continuing jurisdiction to award community estate assets or community estate liabilities to the parties that have not been previously adjudicated." A party may file a postjudgment motion to divide the omitted asset, and the court "shall equally divide" it unless good cause supports an unequal division. An overlooked licensing agreement can come back years later.

Royalties from work created after the date of separation are a different matter. They are separate property under the post-separation earnings rule discussed above.

Royalties also touch spousal support. Family Code § 4320 directs the court to consider factors including the supporting party's "earned and unearned income, assets, and standard of living," each party's "obligations and assets, including the separate property," and "the immediate and specific tax consequences to each party." A spouse receiving half of a community royalty stream may have less need for support. A spouse whose separate royalties are large may have more ability to pay. The interaction is covered in more depth in our article on spousal support in high-net-worth divorce. Royalty income also belongs on the Income and Expense Declaration (FL-150).

Many couples prefer finality. A common negotiated solution is a defined term for royalty sharing, such as a set number of years, instead of an open-ended tie. The tax treatment of royalty payments and IP transfers after divorce is its own question, and tax counsel typically reviews those terms.

How San Diego County Courts Handle IP Disputes in Divorce

Divorces in San Diego County are filed in San Diego Superior Court. The family law division's Central Division sits at 1100 Union Street, San Diego, CA 92101. Cases from North County San Diego may be heard at the Vista Courthouse, 325 South Melrose Drive, Vista, CA 92081. Current locations, hours, and filing details appear on the court's site at sdcourt.ca.gov.

The first filing carries the current statutory fee under Government Code § 70670, which sets a $355 base fee for the first paper in a dissolution. The amount charged at filing is higher: the California Courts self-help site lists it as $435 to $450. Fee waivers and updates are posted by the court.

Disclosure runs through two Judicial Council forms. The Schedule of Assets and Debts (FL-142) is where IP must be listed: patents, pending applications, copyrights, trademarks, trade secrets, and license agreements, whether held personally or through an entity. The Income and Expense Declaration (FL-150) is where royalty and licensing income appears. The California Courts self-help center explains both forms, and courts.ca.gov offers general information on the divorce process and community property.

Complex asset cases sometimes move to a private temporary judge, a retired judge or experienced attorney the parties agree to use under the California Rules of Court. That option can offer more scheduling control and time for expert-heavy hearings, at the parties' own cost.

Local industry shapes the caseload. Life sciences around Torrey Pines, Sorrento Valley, and UTC, defense technology near Kearny Mesa and Miramar, and software and creative work across the county mean IP issues arise regularly in San Diego family courts. Mediation is also used in San Diego County for complex asset disputes, and the San Diego County Bar Association's lawyer referral service can help parties locate mediators. A broader overview of how these cases unfold appears in our article on high-asset divorce in San Diego.

If You'd Like to Talk Through How Your IP Fits In

IP cases turn on details that rarely show up in a general article: the exact date an idea took shape, the terms of an assignment agreement, whether a royalty stream is stable or speculative. A consultation is the place to walk through those facts. The attorney will typically ask when each asset was created, how it is titled or held, what income it produces, and what records exist, then explain which characterization and valuation questions are likely to carry the most weight. Our practice centers on the financial side of high-asset divorce.

To talk through how California's community property rules apply to your patents, copyrights, trademarks, or royalties, call San Diego Family Law Advocates at (858) 330-6989 for a confidential consultation.

Intellectual Property in Divorce: How California Law Treats Patents, Trademarks, and Copyrights