You’ve built something valuable—a process, a formula, a method, a system that gives your business a competitive edge. Now you need to protect it. And the first strategic question is one that many Minnesota business owners get wrong: should you patent it, or keep it as a trade secret?
The instinct for many owners is to assume that if something is valuable, it should be patented. But patents are not always the right answer—and in many cases, trade secret protection is stronger, cheaper, and more practical. The choice between these two strategies has significant long-term consequences for your business, and understanding the tradeoffs is essential.
Understanding the Two Systems
Before comparing them, it’s important to understand what each form of protection actually does.
What Is a Patent?
A patent is a government-granted monopoly that gives you the exclusive right to make, use, and sell an invention for a limited period—typically 20 years from the filing date for utility patents. In exchange for this monopoly, you must publicly disclose exactly how the invention works in enough detail that someone skilled in the field could reproduce it.
This is the fundamental tradeoff of patent law: you get exclusivity, but you give up secrecy.
To qualify for patent protection, your invention must be:
- Novel — it hasn’t been done before
- Non-obvious — it’s not a trivial variation of existing technology
- Useful — it has a practical application
- Patentable subject matter — it falls within the categories of things that can be patented (processes, machines, manufactures, compositions of matter)
What Is a Trade Secret?
A trade secret is any information that derives economic value from being kept confidential and is the subject of reasonable efforts to maintain that secrecy. Under the Minnesota Uniform Trade Secrets Act (MUTSA, Minn. Stat. § 325C.01), this can include formulas, patterns, compilations, programs, devices, methods, techniques, or processes.
There is no registration process for trade secrets. There is no government examination. You simply keep the information secret and take reasonable measures to protect it—and the law provides remedies if someone misappropriates it.
The Head-to-Head Comparison
Cost
Trade secrets: Essentially free to establish. The cost is in maintaining reasonable security measures—access controls, NDAs, employee training, IT security—things most businesses should be doing regardless. There are no filing fees, no attorney fees for prosecution, and no maintenance fees.
Patents: $10,000 to $50,000+ per patent. The costs include patent attorney fees for drafting and prosecuting the application ($8,000-$15,000 for a utility patent), USPTO filing and examination fees ($1,600-$4,000+), and ongoing maintenance fees ($1,600-$7,400 over the patent’s life). For international protection, costs multiply dramatically—potentially $100,000+ per patent across major markets. And this is per invention.
For a growing Minnesota business with multiple innovations, patent costs can be significant. Trade secret protection covers all your confidential information under a single, ongoing protection program.
Duration
Trade secrets: Potentially forever. As long as the information remains secret and continues to provide economic value, trade secret protection continues indefinitely. The Coca-Cola formula has been protected as a trade secret for over 130 years—far longer than any patent could have lasted.
Patents: 20 years maximum. After that, the invention enters the public domain and anyone can use it. And remember—the detailed public disclosure in the patent application means that competitors have been studying your invention the entire time, ready to use it the moment the patent expires.
Scope of Protection
Trade secrets protect against misappropriation—theft, breach of confidence, or improper acquisition. But they do not protect against:
- Independent discovery (someone figures it out on their own)
- Reverse engineering (someone buys your product and takes it apart)
Patents protect against all use, regardless of how the other party learned about the invention. Even someone who independently invents the same thing without any knowledge of your patent is liable for infringement. This is a powerful form of protection.
Public Disclosure
Trade secrets require secrecy. The moment the information becomes generally known—whether through your own disclosure, reverse engineering, or independent discovery—trade secret protection ends.
Patents require full public disclosure. Your patent application becomes a published instruction manual for your invention. Competitors can and do study patent filings to understand what their rivals are doing and to design around the patented technology.
Enforcement
Trade secrets can be enforced under state law (MUTSA in Minnesota, Minn. Stat. § 325C) and federal law (the Defend Trade Secrets Act, 18 U.S.C. § 1836 et seq.). You must prove that the information qualifies as a trade secret and that the defendant misappropriated it.
Patents are enforced exclusively in federal court. Patent litigation is notoriously expensive—median costs for cases with $1-$10 million at stake exceed $2 million through trial. However, the remedies can be substantial, including injunctions, damages, and in some cases treble damages for willful infringement.
When Patent Protection Makes Sense
Patents are the right choice in certain situations:
The invention is easily reverse-engineered. If a competitor can buy your product, take it apart, and figure out how it works, trade secret protection is fragile. A patent prevents them from using what they discover through reverse engineering.
You need to block competitors. Patents give you the affirmative right to exclude others from making, using, or selling the invention—even if they developed it independently. If blocking competition is essential to your business model, patents provide stronger protection.
You plan to license the technology. Patents create a clear, defined property right that can be licensed to others. It’s much harder to license a trade secret because the act of sharing it with a licensee increases the risk of disclosure.
You’re seeking investment or preparing for acquisition. Investors and acquirers often value patent portfolios as tangible assets. Patents appear on the balance sheet. Trade secrets, while valuable, are harder to quantify and verify during due diligence.
The technology has a defined lifespan. If the technology will be obsolete or superseded within 20 years anyway, the time-limited nature of patent protection isn’t a significant disadvantage.
When Trade Secret Protection Makes Sense
Trade secrets are often the better choice—and they’re frequently overlooked:
The information can’t be patented. Many of your most valuable competitive advantages—customer lists, pricing strategies, supplier relationships, internal processes, business methods, marketing data—simply aren’t patentable. Trade secret law protects them all.
The secret isn’t easily discovered. If competitors can’t figure out your method by examining your product or service—internal manufacturing processes, proprietary algorithms run on your servers, business strategies—trade secret protection can last indefinitely.
Cost is a factor. For a growing business with dozens of proprietary processes and methods, patenting everything isn’t economically feasible. Trade secret protection covers all of it under a single protection program.
Speed matters. Patent prosecution takes 2-3 years on average. Trade secret protection begins the moment you implement reasonable measures to maintain secrecy.
The advantage is in execution, not invention. Many business advantages come from doing common things uncommonly well—your particular combination of processes, training methods, quality controls, and operational approaches. These may not be novel enough for a patent, but they’re absolutely protectable as trade secrets.
You operate in a fast-moving industry. If your innovation cycle is measured in months rather than years, the 2-3 year patent prosecution timeline means your patent may issue long after the technology has evolved. Trade secret protection is immediate.
The Hybrid Strategy: Using Both
Sophisticated businesses don’t choose one or the other—they use both strategically across their IP portfolio.
How a Hybrid Approach Works
Patent the visible, keep the invisible secret. Patent the aspects of your product that competitors can see, examine, and reverse-engineer. Keep the behind-the-scenes processes, methods, and know-how as trade secrets.
Example: A manufacturer might patent the design of a finished product (visible to competitors) while keeping the manufacturing process (invisible) as a trade secret. The product design gets 20 years of exclusivity. The process can remain protected indefinitely.
Patent strategically for deterrence. Even a modest patent portfolio can deter competitors from entering your space. Use patents for your most commercially significant inventions while protecting everything else as trade secrets.
Layer protections. A single innovation might be protected by:
- A patent covering the core invention
- Trade secrets covering the implementation details not disclosed in the patent
- NDAs with employees and partners who know those details
- Contractual restrictions with licensees and vendors
Common Mistakes in Hybrid Strategies
Filing a patent application for something better kept secret. Once you file, the clock starts ticking on disclosure. If the application publishes (18 months after filing), the information becomes public—even if the patent is ultimately denied.
Disclosing trade secrets in patent applications. Patent applications require enablement (enough detail to reproduce the invention), but they don’t require you to disclose every implementation detail. Work with patent counsel to draft applications that satisfy the disclosure requirement without revealing more than necessary.
Failing to segregate. If your patent team and trade secret team aren’t coordinating, patented information and trade secret information can get mixed together in ways that compromise the trade secret protection.
A Decision Framework for Business Owners
When evaluating whether to patent or protect as a trade secret, work through these questions:
Step 1: Can It Be Patented?
Not everything can be patented. If the information is a customer list, pricing strategy, business method, or compilation of data, patent protection likely isn’t available. Trade secret protection may be your only option—and that’s fine.
Step 2: Can It Be Reverse-Engineered?
If a competitor can figure out your innovation by examining your product or service, trade secret protection is vulnerable. Consider patenting.
If the innovation is internal—a process, a formula, a method that isn’t apparent from the end product—trade secret protection may be stronger and more practical.
Step 3: What’s the Economic Lifespan?
If the innovation will remain valuable for more than 20 years, a patent’s expiration becomes a real limitation. Trade secrets can protect the information for as long as it remains secret and economically valuable.
Step 4: What Can You Afford?
A utility patent costs $10,000-$50,000+ and takes 2-3 years to obtain. Trade secret protection costs very little beyond the reasonable security measures you should already have in place. For many growing businesses, the math strongly favors trade secret protection for all but the most commercially critical inventions.
Step 5: What’s Your Exit Strategy?
If you’re building toward a sale or IPO within 5-10 years, a patent portfolio adds tangible, verifiable value to your business. Trade secrets add value too, but they’re harder for acquirers to evaluate. Consider patenting your core innovations while maintaining trade secret protection for everything else.
The Minnesota Perspective
Minnesota businesses—particularly those in manufacturing, medical technology, software, and professional services—often have extensive portfolios of proprietary information that deserve protection. Yet many owners focus exclusively on patents and overlook the trade secret protection that covers the vast majority of their competitive advantages.
Under MUTSA (Minn. Stat. § 325C), Minnesota provides robust trade secret protection, including injunctive relief and damages for misappropriation. The federal Defend Trade Secrets Act (18 U.S.C. § 1836 et seq.) adds a federal cause of action and the possibility of ex parte seizure orders in extraordinary cases.
Since Minnesota’s non-compete ban (Minn. Stat. § 181.988) took effect, trade secret protection has become even more critical. You can no longer rely on non-compete clauses to prevent employees from joining competitors. Your trade secret protection program—the reasonable measures you take to identify, secure, and enforce protection of your confidential information—is now your first line of defense.
Frequently Asked Questions
Can the same information be both patented and kept as a trade secret?
Not the same specific information. A patent requires public disclosure, which destroys secrecy. However, you can patent the core invention while keeping implementation details, manufacturing processes, and other related information as trade secrets. This layered approach is common and effective.
What happens if someone independently develops the same thing I’ve kept as a trade secret?
They’re free to use it. Trade secret protection does not prevent independent discovery or reverse engineering. If independent development is a realistic risk for your innovation, patent protection may be more appropriate because patents protect against all use regardless of how the other party developed the technology.
How do I know if my trade secret qualifies for patent protection?
The key requirements are novelty (it hasn’t been done before), non-obviousness (it’s not a trivial extension of existing knowledge), and utility (it has a practical use). A patent attorney can conduct a patentability search and assessment, typically for $2,000-$5,000, to evaluate whether your innovation meets these requirements.
If I decide to patent something I’ve been keeping secret, is there a deadline?
Yes. In the United States, you generally have one year from the first public use, sale, or disclosure of the invention to file a patent application (the “grace period”). If you’ve kept it secret and haven’t publicly used or sold the inventive aspects, the clock hasn’t started. But act promptly—every day of delay increases the risk that someone else files first, since the U.S. operates on a first-to-file system.
Is trade secret protection really “free”?
The protection itself costs nothing to establish—there’s no filing fee or registration process. But maintaining it requires ongoing investment in reasonable security measures: access controls, NDAs, employee training, IT security, and document management. These costs are generally modest and overlap significantly with good business practices you should have in place regardless.
For guidance specific to your situation, contact Aaron Hall, attorney for business owners, at aaronhall.com or 612-466-0040.
