In law, something is proprietary when a single person or company owns it exclusively and controls who else can use, copy, or benefit from it. So the question “what is proprietary in law” is really a question about ownership rights: the owner holds the legal power to possess the asset, use it, profit from it, exclude others, and transfer it to someone else. Lawyers call this the “bundle of rights,” and it applies just as forcefully to intangible things like software code, brand names, and secret formulas as it does to physical property.
Courts treat proprietary rights as a form of capital. You can sell them, license them for a fee, or pledge them as collateral. If someone uses your proprietary asset without permission, you can sue for damages and ask a court to stop the unauthorized use. The boundary between what belongs to you and what belongs to the public is what makes creating something valuable worth the effort.
What Counts as a Proprietary Asset
Proprietary protections cover four main categories, each governed by a different body of law. Which one applies depends on what the asset is and how it creates value.
- Trade secrets. Confidential business information that has economic value because it is kept secret. Formulas, customer lists, pricing strategies, manufacturing techniques, and internal processes all qualify. Protection lasts as long as the information stays confidential.
- Patents. Exclusive rights granted to an inventor who publicly discloses how an invention works. A patent lets the owner block others from making, using, or selling the invention for a limited period. The price of the exclusivity is full disclosure.
- Copyrights. Protection for original creative works, including software source code, written content, music, and visual art. Copyright attaches automatically on creation, though registration unlocks stronger enforcement tools.
- Trademarks. Protection for brand identifiers like names, logos, and slogans that distinguish your goods from a competitor’s. Trademarks can last indefinitely with proper use and renewal.
These categories often overlap. A single piece of software might carry a trademarked name, copyrighted source code, a patented algorithm, and trade-secret business logic all at once. Companies that take proprietary rights seriously tend to layer the protections rather than rely on just one.
How Long Each Protection Lasts
Each type of proprietary protection runs on its own clock, and the timelines matter because they decide when the asset enters the public domain.
- Patents. A utility patent lasts 20 years from the filing date of the application. The owner must also pay maintenance fees to keep it active. When the term ends, anyone can use the invention.1Office of the Law Revision Counsel. 35 USC 154 – Contents and Term of Patent; Provisional Rights
- Copyrights. For works created by an individual author, copyright lasts for the author’s lifetime plus 70 years. For works made for hire and anonymous or pseudonymous works, protection runs 95 years from first publication or 120 years from creation, whichever ends first.2Office of the Law Revision Counsel. 17 USC 302 – Duration of Copyright; Works Created on or After January 1, 1978
- Trademarks. A federal trademark registration lasts 10 years and can be renewed in 10-year increments indefinitely, as long as the mark remains in active use.3Office of the Law Revision Counsel. 15 USC 1059 – Renewal of Registration
- Trade secrets. No expiration. Protection continues for as long as the information stays secret and the owner maintains reasonable security measures. Some secrets have been protected for more than a century.
These timelines explain why a company might choose trade secret protection over a patent, or vice versa. A patent gives stronger exclusivity but caps at 20 years and requires telling the world how the invention works. A trade secret can last forever on paper, but the owner carries the risk that a competitor will independently develop or legitimately reverse engineer the same thing. The Supreme Court has confirmed that trade secret law and patent law can coexist, so the choice is strategic rather than forced.
Trade Secrets in More Detail
Trade secrets sit apart from the other categories because they require no registration, no filing fees, and no government review. Two conditions do all the work: the information must have economic value because it is secret, and the owner must take reasonable steps to keep it that way.
Most states follow the Uniform Trade Secrets Act.4Legal Information Institute. Trade Secret At the federal level, the Defend Trade Secrets Act, codified at 18 U.S.C. ยง 1836, created a federal cause of action in 2016, letting owners sue in federal court regardless of where the misappropriation occurred.5Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings The federal definition sweeps in financial, business, scientific, technical, and engineering information in any form, physical or electronic.6Office of the Law Revision Counsel. 18 USC 1839 – Definitions
The limit on trade secret protection is important. It blocks improper acquisition, not independent discovery. If a competitor legitimately reverse engineers your product or arrives at the same formula on their own, you have no claim.
Who Owns What Employees Create
The most common proprietary ownership dispute pits employers against employees. The default rules differ depending on which type of intellectual property is at stake.
Copyright and the Work-for-Hire Doctrine
Under the Copyright Act, anything an employee creates within the scope of their job automatically belongs to the employer. The statute calls this a “work made for hire,” and the employer is treated as the legal author from the moment of creation.7Office of the Law Revision Counsel. 17 USC 101 – Definitions Independent contractors are handled differently: their work qualifies as a work made for hire only if it falls into one of nine specific categories and the parties sign a written agreement saying so. The default can also be flipped by a signed contract, so whatever employment or engagement paperwork you sign governs.
Patents and Invention Assignment Agreements
Patent law has no automatic employer-ownership rule equivalent to work-for-hire. Instead, most employers require employees to sign invention assignment agreements that transfer ownership of inventions created during employment, using company resources, or related to the company’s business. These agreements usually require prompt disclosure of any inventions and cooperation with patent filings. Engineers, scientists, and developers almost always sign one at hiring.
Whistleblower Carve-Out
The Defend Trade Secrets Act protects employees who disclose trade secrets to government officials or attorneys for the purpose of reporting suspected legal violations. Sharing confidential information in confidence with a government official or in a sealed court filing cannot be the basis of federal or state trade secret liability.8Office of the Law Revision Counsel. 18 USC 1833 – Exceptions to Prohibitions
Proprietary Software vs. Open Source
Outside the legal profession, most people meet the word “proprietary” in software. With proprietary software, the company keeps its source code closed. You buy a license to use the program, but you cannot see how it works, modify it, or share copies. The license typically restricts installations and prohibits reverse engineering.
Open-source software goes the other direction. The source code is public, and the license grants permission to study, modify, and redistribute it. The proprietary model trades that community flexibility for full control over the product and its revenue. The choice is a business decision, not a legal requirement, and plenty of companies run both tracks at once.
What Owners Can Do When Rights Are Violated
Proprietary rights are only as strong as the remedies behind them. The Defend Trade Secrets Act gives trade secret owners several options in federal court, and parallel remedies exist under patent, copyright, and trademark law.
The most immediate tool is an injunction, a court order stopping the unauthorized use. Courts can enjoin both actual and threatened misappropriation. One limit: a court cannot use an injunction simply to keep someone from taking a new job. Any employment restriction has to rest on evidence of actual threatened misappropriation, not on the general knowledge the person carries in their head.
On damages, the statute allows three measures. An owner can recover actual losses caused by the misappropriation, plus any unjust enrichment the defendant gained that is not already captured in those losses. In the alternative, the court can award a reasonable royalty for the unauthorized use. If the misappropriation was willful and malicious, the court can double the damages and order the defendant to pay attorney fees.5Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings
NDAs and Everyday Protection
Formal registration is only part of the picture. The workhorse tool for protecting proprietary information in daily business is the non-disclosure agreement. An NDA creates a contractual duty to keep specified information confidential, and breaching it exposes the violator to a lawsuit, potential injunctions, and damages.
NDAs show up in employment agreements, vendor relationships, merger discussions, and any situation that requires sharing sensitive information outside the organization. To hold up in court, an NDA should identify the covered information clearly, run for a reasonable period, and avoid being so broad that it restricts activity unrelated to the confidential material. Overly broad NDAs risk being found unenforceable, and some statutes carve out specific exceptions. NDAs cannot be used to stop employees from reporting suspected legal violations to government authorities, and the Speak Out Act of 2022 limits NDA enforcement in sexual harassment disputes.
Treat an NDA as a complement to the other protections, not a substitute. Requiring confidentiality agreements is one of the “reasonable measures” courts look at when deciding whether something qualifies as a trade secret in the first place. Share sensitive information without one and a court may well conclude the owner did not do enough to protect it, which can sink the entire claim.