# Atlantic Research v. Troy: The Line Between Patent and Trade Secret

> The Federal Circuit voided reissue handguard claims for lack of written description while finding a trade secret could cover what the patent never disclosed.

Topic: Trade Secrets  |  Author: Lidiia Levitska  |  Source: Intellectual Property Law (outsideipcounsel.com)
Canonical: https://outsideipcounsel.com/blog/atlantic-research-v-troy-patent-trade-secret-boundary/


Companies that run parallel patent and trade-secret programs face a line-drawing problem every day: what goes into the patent, and what stays a secret? *Atlantic Research Marketing Systems, Inc. v. Troy*, 659 F.3d 1345 (Fed. Cir. 2011), decided October 6, 2011 in an opinion by Judge Sharon Prost of the United States Court of Appeals for the Federal Circuit, is a rare decision that polices that exact boundary. The court invalidated reissue patent claims because they reached beyond what the inventor had disclosed, yet it held that the very design the patent failed to describe could still be protected as a trade secret. The two rulings are mirror images of one principle: a patent protects what you disclose, a trade secret protects what you do not, and the same feature can fall on only one side of that line.

## At a glance

- **Case:** *Atlantic Research Marketing Systems, Inc. v. Troy*, 659 F.3d 1345 (Fed. Cir. 2011)
- **Decided:** October 6, 2011, opinion by Judge Sharon Prost; patent invalidity affirmed, trade-secret sufficiency affirmed, jury verdict vacated and a new trial ordered
- **Holding:** Reissue claims 31 to 36 were invalid for lack of written description because they exceeded what the specification disclosed, while the evidence was sufficient to support a trade secret in the single-support handguard design that the patent did not disclose.
- **Significance:** A pointed illustration that the boundary between patent disclosure and trade-secret protection is real and enforceable, and that what a patent omits can remain a protectable secret.

## The handguard and the two designs

Atlantic Research Marketing Systems, known as ARMS, made handguards for rifles. A handguard surrounds the barrel and provides a platform to which a shooter can attach accessories such as sights and grips. The inventor, Mr. Swan, developed a sleeve-style handguard. The original patent, later reissued as RE39,465, described in its specification a handguard supported at two points on the weapon: at the receiver, through a sleeve, and at the barrel nut. That two-point support was what the written description taught.

Stephen Troy, a former ARMS employee, later developed and patented his own handguard supported at only a single point, the barrel nut, without the receiver-sleeve support. When ARMS obtained its reissue patent, it added claims 31 to 36, which claimed handguards supported at only one point, the barrel nut. ARMS then asserted infringement, and Troy responded that the new claims were invalid because they covered a design the original specification never described. ARMS also asserted a trade-secret claim covering the single-support design.

## The written-description requirement as a boundary

The patent ruling rested on 35 U.S.C. 112, which requires that a patent's specification contain a written description of the invention sufficient to show that the inventor possessed the claimed subject matter as of the filing date. The doctrine polices the match between what an applicant discloses and what the applicant claims. A patentee cannot claim more than the specification supports; the claims must be commensurate with the disclosed invention.

The Federal Circuit held that claims 31 to 36 failed that test. The specification described a two-point support system, with the handguard held at both the receiver sleeve and the barrel nut. The new reissue claims covered a handguard supported at a single point, the barrel nut alone. Nothing in the original disclosure showed that the inventor had possessed, or described, a single-support design. In the court's framing, the claims exceeded in scope the subject matter that the inventor chose to disclose to the public. Because the specification did not support them, the claims were invalid for lack of written description.

The phrase "chose to disclose to the public" is the doctrinal hinge. A patent is a disclosure document. Its protection extends only to what the inventor actually taught the public in the specification. Claims that reach past that disclosure are not a permissible extension of the patent bargain; they are an attempt to claim what was never given to the public in exchange for exclusivity.

## The trade secret that lived in the gap

Here is where the case earns its place in trade-secret literature. ARMS also claimed the single-support design as a trade secret, and Troy moved for judgment as a matter of law on that claim. The Federal Circuit affirmed the denial of that motion, holding the evidence legally sufficient to support a trade secret in the single-support handguard design. The reasoning follows inexorably from the patent ruling. Because the specification did not disclose the single-support design, the public never learned it from the patent. Information the patent did not reveal remained, in principle, capable of being a trade secret. The very disclosure failure that doomed the reissue claims preserved the possibility of trade-secret protection for the same design.

This is the boundary at work. Patent and trade secret are complementary regimes divided by disclosure. What you put in the specification you dedicate to the public in exchange for a term of exclusivity; what you keep out you may guard as a secret. ARMS could not have both a valid patent claim and a trade secret in the identical disclosed feature, but because the single-support design was outside the patent's disclosure, it could live on the trade-secret side of the line.

The victory was procedurally incomplete. Although the Federal Circuit affirmed that the evidence supported a trade secret, it also vacated the jury's verdict, reversed the denial of Troy's motion for a mistrial, and ordered a new trial. During deliberations an extraneous item, a clamp, had reached the jury room, and the trial court had not adequately investigated whether that outside evidence tainted the verdict. The doctrinal holding on the patent and trade-secret boundary stands independent of that procedural defect, but ARMS had to try the trade-secret claim again rather than bank the verdict.

## What the case teaches about dual-track strategy

*Atlantic Research* gives practitioners a clean statement of a principle often muddled in practice: a single feature cannot be simultaneously claimed in a valid patent and held as a trade secret, because the patent regime requires disclosure and the trade-secret regime requires secrecy. The decision also cuts against a temptation that arises in reissue and continuation practice, the temptation to broaden claims after filing to capture designs the market has revealed. Written description is the check. An inventor cannot use later claim amendments to reach a design the original specification never described, no matter how commercially attractive that design turns out to be.

For companies, the lesson is planning discipline. Decide at the outset which aspects of an innovation to disclose and patent and which to withhold and protect as secrets, and align the patent claims with the actual disclosure. Trying to have it both ways, patenting broadly while also asserting secrecy over the same feature, invites the exact split ARMS experienced: invalid claims on one side, a surviving but separate trade-secret theory on the other.

## Open questions

The decision resolves the boundary in the case before it but leaves related questions. It does not fully address how courts should treat a feature that is arguably implicit in a specification but not expressly described, where the written-description and trade-secret analyses could pull in opposite directions. It leaves unsettled how the analysis applies when an inventor discloses a genus but claims or keeps secret a specific species within it. And because the trade-secret verdict was vacated on jury-taint grounds rather than resolved on the merits, the case does not tell us how ARMS's secrecy measures and the reasonable-efforts requirement would ultimately have fared before a properly insulated jury, a reminder that a sufficiency ruling is not a final win.

## Implications for inventors and businesses

- **Align claims with disclosure.** Written description invalidates claims that reach beyond the specification. Do not draft or amend claims to cover designs the specification never described, because the Federal Circuit will treat that gap as fatal.
- **What you leave out of the patent may be protectable.** A design the specification does not disclose is not dedicated to the public through the patent and can remain a trade secret. Be deliberate about what you disclose and what you withhold.
- **You cannot patent and keep secret the same feature.** The two regimes are divided by disclosure. Decide feature by feature which side of the line each innovation belongs on, and do not assert both for the identical element.
- **A sufficiency ruling is not the finish line.** ARMS survived JMOL yet still faced a retrial because of jury taint. Protect the integrity of the trial process, and remember that legally sufficient evidence is necessary but not sufficient to bank a verdict.

## Frequently asked questions

**Can something be a trade secret if it was not disclosed in your patent?** Yes, and that is the core of *Atlantic Research v. Troy*. The Federal Circuit invalidated reissue claims for a single-support handguard because the specification did not describe that design, meaning the inventor never disclosed it to the public in the patent. But the court affirmed that the evidence could support a trade secret covering the same single-support design, precisely because it was not in the patent. What a patent fails to disclose can remain protectable as a trade secret.

**Why were the reissue claims invalid?** For lack of written description under 35 U.S.C. 112. The original specification described a handguard supported at two points, the receiver sleeve and the barrel nut. The reissue claims 31 to 36 covered a handguard supported at only one point, the barrel nut. The Federal Circuit held those claims exceeded the scope of what the inventor actually disclosed, so they were not supported by the specification and were invalid.

**Did Atlantic Research win its trade-secret claim outright?** Not outright. The Federal Circuit affirmed the denial of judgment as a matter of law on the trade-secret claim, holding the evidence was legally sufficient to support a trade secret in the single-support design. But the court also vacated the jury verdict and ordered a new trial because an extraneous item, a clamp, reached the jury room and the trial court had not adequately investigated the resulting taint. The doctrinal point on the patent and trade-secret boundary stands; the verdict itself required a retrial.

## Authorities and sources

- *Atlantic Research Marketing Systems, Inc. v. Troy*, 659 F.3d 1345 (Fed. Cir. 2011), slip opinion (Nos. 2011-1002, 2011-1003): [U.S. Court of Appeals for the Federal Circuit](https://www.cafc.uscourts.gov/opinions-orders/11-1002-1003.pdf)
- *Atlantic Research Marketing Systems, Inc. v. Troy*, full text of the opinion: [FindLaw](https://caselaw.findlaw.com/us-federal-circuit/1581697.html)
- *Atlantic Research Marketing Systems, Inc. v. Troy*, case brief: [Quimbee](https://www.quimbee.com/cases/atlantic-research-marketing-systems-inc-v-troy)
- *Atlantic Research Marketing Systems, Inc. v. Troy*, Federal Circuit summary: [Life Science IP](https://lifescienceip.wordpress.com/2011/11/03/altantic-research-marketing-systems-inc-v-stephen-p-troy-jr-and-troy-industries-inc/)
- 35 U.S.C. 112 (specification and written-description requirement): [Cornell LII](https://www.law.cornell.edu/uscode/text/35/112)