A Competitor Copied My Product. Is That Illegal, and What Can I Do?
Last updated: November 2026. Reviewed by Pavel Kolmogorov, California business litigation attorney (State Bar No. 321018).
Not automatically. Unless a patent, copyright, or other intellectual property right protects a product, competitors are generally free to copy it, and the Supreme Court has said so directly. (TrafFix Devices, Inc. v. Marketing Displays, Inc. (2001) 532 U.S. 23, 29.) A look-alike at half the price may be unlawful when it takes something the law protects: a recognized design, original artwork, your brand name, a patented feature, or a secret obtained improperly. Kolmogorov Law, P.C. litigates these claims for product companies in Orange County, Los Angeles, and across California.
Call (909) 235-6116 or contact us online to discuss a knockoff of your product and which claims fit.
Why copying a product is legal by default
This surprises nearly every owner I talk to. The law does not protect effort, or being first, or having the better idea. It protects specific things, and everything else is open to competition.
The Supreme Court has said that copying is not always disfavored and can benefit the public, including by spurring advances in technology. A cheaper version of your product is not a legal wrong. The question in every knockoff case is which protected interest, if any, the copier took. Our overview of trademark, copyright, patent, and trade secret law sorts out the four systems.
Trade dress: when the look itself identifies you
Trademark law can protect the appearance of a product, but the bar for product design is high. A design is protected as unregistered trade dress only on a showing of secondary meaning. Buyers must have come to associate the look with a single source. (Wal-Mart Stores, Inc. v. Samara Brothers, Inc. (2000) 529 U.S. 205, 216.) The Court's reasoning was blunt: consumers assume a design exists to make the product more useful or more appealing, not to say who made it. (Id. at p. 213.)
Two more hurdles follow. You must prove the design is not functional. (15 U.S.C. § 1125(a)(3).) And you must show that the copy is likely to confuse buyers about source.
Packaging is easier to protect than the product inside it. If the knockoff mimics your box, colors, and layout, start there. Our page on trade dress infringement covers the proof.
Copyright: artwork and separable design features
Copyright does not protect the shape of a useful object as such. The design of a useful article is protected only to the extent it incorporates pictorial, graphic, or sculptural features that can be identified separately from the article's utilitarian aspects and can exist independently of them. (17 U.S.C. § 101.)
In practice that covers more than owners expect. A printed pattern, an illustration on the product, a sculpted ornament, label art, product photographs, and the instruction booklet can each be a copyrighted work. The bare functional form usually is not. Knockoff sellers routinely lift photos and listing text along with the design, and that is often the fastest claim to prove. See our page on the elements of copyright infringement.
Brand misuse and false claims
Check what the look-alike is called and how it is sold. A copy that carries your name or logo, or a mark nearly identical to a registered one, can move the case from imitation to infringement where buyers are likely to be confused, and possibly to counterfeiting. Our counterfeit products page covers those remedies.
Advertising matters too. A seller that describes its copy as the original, claims it is made in the same factory, or invents a comparison may be liable for false advertising. (15 U.S.C. § 1125(a)(1)(B).) That claim does not depend on owning any design right. Our page on false advertising by a competitor explains it.
Patents: only if you hold one
A utility patent covers how a product works, and a design patent covers a new, original, and ornamental design for an article of manufacture. (35 U.S.C. §§ 101, 171(a).) A design patent generally lasts 15 years from the date of grant, or 14 years if the application was filed before May 13, 2015. (35 U.S.C. § 173.) If you hold one, it may be your strongest right against a look-alike, and patent counsel should look at it.
This firm does not prosecute patents. I raise them because "patent pending" on a box, or an assumption that a product must be patented, is not a patent. Unless and until a patent is granted, there is no patent claim to bring for that product.
When the copier is an insider
Many knockoffs come from people who had your specifications: a contract manufacturer, a former employee, a distributor, or a would-be investor. That changes the analysis.
If the copier used confidential drawings, formulas, tooling files, or supplier lists, you may have trade secret and contract claims. California defines improper means to include theft and breach of a duty to maintain secrecy. Reverse engineering alone is not improper. (Civ. Code, § 3426.1, subd. (a).) A stranger who bought your product and took it apart did nothing wrong under this law. A factory that ran an extra shift with your molds is in a very different position. Our page on what counts as a trade secret covers the definition.
How to choose a path
Start with evidence. Buy the knockoff, keep the packaging and the receipt, and capture the listings. Lay both products side by side and list exactly what was taken: name, packaging, artwork, shape, text, photos.
Then match each item to a right you can prove. Registered copyrights and marks usually move fastest, including on online marketplaces. Trade dress in a product shape takes sales data, advertising, and often a survey. An insider case turns on your agreements and who had access.
Be realistic about the remainder. If all the competitor took was an unpatented functional idea, the answer may be to compete, and to protect the next product before launch.
What to bring to the first meeting
- Samples or photos of both products and their packaging.
- Any patents, registrations, or applications.
- Sales and advertising history for the design.
- Agreements with manufacturers, employees, and distributors who saw the specifications.
Frequently asked questions
A competitor is selling a product that looks almost exactly like ours at half the price. Is that illegal?
Not by itself. Under federal law a product that no patent, copyright, or trademark right protects is generally open to copying. The knockoff may be unlawful if it copies a nonfunctional design that buyers recognize as yours, your artwork or photos, your brand name, or a patented feature, or if it was built from trade secrets taken improperly. California businesses can enforce each of those rights in court.
Is it legal to copy a product that is not patented?
Often, yes. The absence of a patent means the functional design is usually free to copy. Other rights may still apply: trade dress where the look has acquired secondary meaning, copyright in separable artwork, trademark in the name and logo, and California trade secret law where the copier obtained confidential information improperly.
Our former manufacturer is now selling our design under its own brand. What claims do we have?
Look first at the manufacturing agreement and any confidentiality terms. A factory that used your drawings, molds, or formulas for its own line may be liable in California for breach of contract and trade secret misappropriation. That can be true even where a stranger could lawfully have reverse engineered the same product. Trade dress and copyright claims may apply as well.
Can I copyright the design of my product?
Only parts of it. Federal copyright law protects the design of a useful article to the extent it has pictorial, graphic, or sculptural features that are separable from the article's function. Surface art, patterns, and ornamental sculpture can qualify. The functional shape of a tool, container, or garment generally cannot.
How do I prove trade dress in a product design?
You must show that buyers associate the design with one source, that the design is not functional, and that the copy is likely to cause confusion. Evidence includes years of sales, advertising that features the look, press coverage, intentional copying, and consumer surveys. Federal courts in California require secondary meaning for every unregistered product design claim.
Talk to a California intellectual property litigation attorney
If a look-alike is cutting into your sales, call (909) 235-6116 or contact us online. Kolmogorov Law, P.C. is at 327 Magnet, Irvine, CA 92618, and represents product companies in Orange County, Los Angeles, and throughout California. Our IP litigation practice page describes the wider practice.
This page provides general information about federal and California intellectual property law and is not legal advice. Outcomes depend on what was copied, the rights you hold, and the court.