Smith v. Dravo: When Sale Talks Create a Duty of Confidence

In Smith v. Dravo Corp., 203 F.2d 369 (7th Cir. Apr. 10, 1953), the United States Court of Appeals for the Seventh Circuit answered a question that recurs in nearly every failed merger and abandoned acquisition: when a company opens its books and hands over its secret designs to a prospective buyer, and the buyer walks away and builds a competing product using what it learned, has the buyer done anything wrong? The district court had said no, finding that public use of the containers and freely circulated publicity had destroyed any secret and that the design was available to anyone who inspected a container. Judge Walter Lindley, writing for the Seventh Circuit, reversed on the trade-secret count. A confidential relationship, he held, need not be spelled out in a contract; it can be implied from the circumstances of the disclosure itself. The decision remains a foundational statement of the “duty of confidence” branch of trade-secret misappropriation.

At a glance

• Case: Smith v. Dravo Corp., 203 F.2d 369
• Court: U.S. Court of Appeals for the Seventh Circuit
• Author: Circuit Judge Walter C. Lindley
• Decided: April 10, 1953
• Posture: Appeal from a judgment for the defendant; the Seventh Circuit reversed the judgment on the trade-secret count and remanded, while affirming the judgment on the unjust-enrichment count and on the two patent counts, where it agreed that Smith’s patents lacked patentable invention
• Jurisdiction and governing law: Diversity (plaintiffs citizens of Wisconsin and a Wisconsin corporation; defendant a Pennsylvania corporation). Sitting in Illinois, the court applied Illinois conflicts rules under Erie and Klaxon, which pointed to the law of the place of the wrong. That was Pennsylvania, where Dravo used the information, so Pennsylvania trade-secret law governed, with the Restatement (First) of Torts § 757 cited alongside it
• Holding: A confidential relationship sufficient to support a misappropriation claim may be implied from the parties’ conduct (here, the disclosure of secret designs during negotiations to sell the business) without any express promise of secrecy
• Significance: A leading authority that the duty not to use or disclose another’s trade secret can arise implicitly from the context of the disclosure, especially in acquisition negotiations

The plaintiffs were connected to the business of Leathem D. Smith, who had developed a successful and valuable design for shipping freight containers, sold through the Safeway Container enterprise. After Smith’s death, those controlling the business sought to sell it. The Dravo Corporation, a Pennsylvania concern, expressed interest in buying. To let Dravo evaluate the acquisition, the sellers furnished it with a detailed package of confidential information about the container business: patent applications for both the knock-down and rigid designs, blueprints of both, a miniature container, and files of inquiry letters and correspondence with prospective users. Dravo’s representatives also toured the plant at Sturgeon Bay, Wisconsin. Dravo studied the materials, then rejected the sellers’ offer on January 30, 1947. The next day it announced plans to design and produce its own shipping container, and its final product incorporated many, if not all, of the features of Smith’s design. Because Dravo’s container was four inches narrower, the two could not be used interchangeably, and the Smith containers became obsolete. The plaintiffs sued for misappropriation of their trade secrets and for infringement of Smith’s patents.

The problem: no express promise

Dravo’s principal defense was that there was no secret left to protect. The containers had been in public use, and circulars and trade magazines had described their features, so anyone could have learned the design by inspecting one. Running alongside that was the point the court took up on its own terms, and the one the case is remembered for. No one had asked Dravo to sign a nondisclosure agreement. No clause in any document forbade Dravo from using what it saw. The sellers had simply handed over the information, hoping to make a sale. If a duty of confidentiality must be created by an express promise, Dravo owed none.

The Seventh Circuit disposed of the secrecy defense first. The publicity had revealed outward dimensions and the general fact of double doors, lifting eyelets, stacking sockets and folding legs, but not the engineering details, and while Dravo might have inspected a container, nothing in the record showed that it had. Pennsylvania, the court reasoned, would not deny recovery merely because the design could have been obtained by inspection. The proper question was how the defendant learned of the plaintiffs’ design.

The court then rejected the premise that confidentiality must be express. The controlling question, the court reasoned, was not whether Dravo had promised secrecy in so many words, but whether the parties’ dealings created a relationship in which the disclosure was understood to be for a limited purpose. The materials were not broadcast to the world; they were delivered to a single prospective purchaser, for the specific and limited end of appraising a possible acquisition. That context, the court held, carried with it an implied understanding that Dravo would not turn the disclosures to its own competitive advantage.

How a duty of confidence is implied

The opinion works through the four elements Pennsylvania law supplied, taken from Macbeth-Evans Glass Co. v. Schnelbach, 239 Pa. 76, 86 A. 688 (1913): existence of a trade secret, communicated to the defendant, while the defendant is in a position of trust and confidence, and used by the defendant to the plaintiff’s injury. Restatement (First) of Torts § 757, cited alongside, imposes liability on one who uses or discloses another’s trade secret where the secret was disclosed to him in confidence. The doctrinal move in Dravo is to read the third element functionally rather than formally. A confidence can be reposed without ceremony. When a business opens its proprietary designs to a counterparty for evaluation in a transaction, the surrounding circumstances (the limited audience, the limited purpose, the commercial expectations of both sides) supply the confidential character the element requires.

The court’s support came from precedent, not from any general theory of dealmaking. In Pressed Steel Car Co. v. Standard Steel Car Co., 210 Pa. 464, 60 A. 4 (1905), a manufacturer had delivered blueprints to customers so they could better acquaint themselves with the railroad cars they were purchasing, and the Pennsylvania Supreme Court treated the plans as held in confidence because, “[w]hile there was no expressed restriction placed on the ownership of the prints, or any expressed limitation as to the use to which they were to be put, it is clear … that the purpose for which they were delivered by the plaintiff was understood by all parties.” The Seventh Circuit called that language “applicable and determinative.” The plaintiffs disclosed their design for one purpose, to let Dravo appraise it with a view to purchasing the business, and there was no question that Dravo knew and understood that limited purpose. The court added Justice Holmes’s observation from E. I. duPont de Nemours Powder Co. v. Masland, 244 U.S. 100, 102 (1917), that “the first thing to be made sure of is that the defendant shall not fraudulently abuse the trust reposed in him.” Nor did it help Dravo to say the dealings were at arm’s length: the implied limitation on use, the court wrote, “had its roots in the ‘arms-length’ transaction.”

The result also fits the practical realities of dealmaking. Acquisitions cannot happen unless targets disclose; targets will not disclose if disclosure means forfeiture. To hold that a prospective buyer may freely exploit everything it learns during due diligence, absent a signed agreement, would make every sale negotiation a trap for the seller.

Two features of the analysis deserve emphasis. First, the duty arises from the relationship, not from the secrecy of each datum considered in isolation; what matters is that the package of designs and data was confidential and was furnished for a constrained purpose. Second, the breach lies in the use (Dravo’s manufacture of competing containers embodying Smith’s features), not merely in the receipt of the information. Misappropriation by an implied-confidence theory thus turns on the defendant’s exploitation of what it was trusted to evaluate.

Use, not just acquisition

Dravo is a useful corrective to the intuition that misappropriation is fundamentally about how a defendant got a secret. Dravo obtained the designs entirely properly: they were handed over voluntarily. The wrong was in what Dravo did next. The case thus sits at the “acquisition/use/disclosure” core of misappropriation doctrine, illustrating that a defendant who lawfully receives a secret in confidence still misappropriates it by using it for an unauthorized purpose. The later Uniform Trade Secrets Act codified exactly this structure, defining misappropriation to include use or disclosure of a secret acquired “under circumstances giving rise to a duty to maintain its secrecy,” language that reads almost as a summary of Dravo.

Open questions

The decision establishes that confidentiality can be implied but does not exhaustively specify when. Several boundaries remain contested in its wake. How much “context” is enough? Does any disclosure during negotiations carry an implied duty, or only disclosures of plainly proprietary material to a single, identified counterparty? What happens when the parties’ communications are ambiguous about purpose, or when some of the disclosed information was independently available? And how does the implied-confidence theory interact with a sophisticated counterparty’s failure to demand an NDA? Does the availability of an express protection weaken the inference of an implied one? Modern transactional practice has largely answered the prudential version of these questions by making written confidentiality agreements ubiquitous, but Dravo still governs the cases where the paperwork is missing, incomplete, or predates the critical disclosure.

Implications

• Disclosure for a limited purpose implies a limited license. Handing secret information to a counterparty for evaluation does not authorize competitive use; the law can imply a duty of confidence from the transaction itself.
• A signed NDA is not a prerequisite to a misappropriation claim. While written agreements are strongly advisable, their absence is not fatal where the circumstances show the disclosure was confidential.
• Misappropriation can lie in use, not just acquisition. A defendant who lawfully receives a secret may still be liable for exploiting it beyond the purpose for which it was shared.
• Due-diligence disclosures are high-risk. Sellers should treat every data-room disclosure as a potential exposure and protect it contractually; buyers should assume that information received in negotiations may carry use restrictions even absent explicit terms.
• The rule is now codified. The UTSA’s “duty to maintain secrecy” language tracks Dravo, so its reasoning remains directly applicable under modern statutes.

Frequently asked questions

Did Dravo steal or improperly obtain the designs? No. Dravo received the blueprints and data voluntarily, as part of legitimate acquisition negotiations. The misappropriation lay not in how Dravo acquired the information but in its subsequent use of that information to build competing containers, in breach of an implied duty of confidence.

Was there a written confidentiality agreement? No. As the court put it, no express promise of trust was exacted from Dravo. Dravo’s main argument was a different one, that public use and trade publicity had left no secret to protect. The Seventh Circuit held that the engineering details remained secret and that a confidential relationship could be implied from the circumstances of the disclosure, so no signed agreement was required to support liability.

What is the practical lesson for companies exploring a sale or merger? Disclosures made to evaluate a transaction can carry implied use restrictions, but relying on implication is risky. Sellers should require a written nondisclosure and non-use agreement before opening a data room, and buyers should recognize that information received in diligence may not be free for competitive use.

Authorities and sources

• Smith v. Dravo Corp., 203 F.2d 369 (7th Cir. Apr. 10, 1953), full text, Public.Resource.Org: https://law.resource.org/pub/us/case/reporter/F2/203/203.F2d.369.10683.html
• Smith v. Dravo Corp. case summary, Quimbee: https://www.quimbee.com/cases/smith-v-dravo-corp
• “Torts—Trade Secrets—Necessity of Confidential Relationship,” 1953 Washington University Law Quarterly 446 (discussing Smith v. Dravo): https://journals.library.wustl.edu/lawreview/article/id/3786/
• E. I. duPont de Nemours Powder Co. v. Masland, 244 U.S. 100 (1917) (Holmes, J., on the trust reposed in the defendant), Cornell LII: https://www.law.cornell.edu/supremecourt/text/244/100
• Restatement (First) of Torts § 757 and the duty of confidence, overview: https://www.law.cornell.edu/wex/trade_secret