Competing manufacturers of torque-related tools were embroiled in interference proceedings in the United States Patent Office involving overlapping applications assigned to each side. During those proceedings, an assignor aligned with Precision Instrument submitted sworn statements claiming earlier dates of invention and reduction to practice. Evidence later surfaced showing those statements were false; perjury had been committed to antedate a rival claim. Automotive Maintenance Machinery (AMMCO) and its counsel learned of the falsity during the interferences. Rather than bring the perjury to the Patent Office's attention, AMMCO negotiated a settlement with Precision that effectively resolved the interferences and cleared the path for issuance of patents aligned with Precision's position. The settlement contemplated mutual accommodations and private rights flowing from the patents' issuance, while the evidence of perjury remained undisclosed to the Patent Office. After the patents issued, AMMCO brought suit seeking equitable relief to enforce rights dependent on the settlement and the patents, including specific performance and related enforcement. The lower courts granted AMMCO relief. Precision sought Supreme Court review, contending that AMMCO's suppression of the fraud in the Patent Office barred AMMCO from invoking equity.
May a party that knowingly suppressed evidence of perjury and fraud in Patent Office interference proceedings obtain equitable relief to enforce private agreements or patent rights that depend upon the tainted proceedings?
A party seeking relief in equity must come with clean hands. In the patent context, because of the overriding public interest in the integrity of the patent system, applicants, patentees, their assignees, and their attorneys owe a duty of the highest candor and good faith in all dealings with the Patent Office. Courts of equity will not assist a party who has engaged in, benefited from, or knowingly suppressed fraud or perjury used to procure or maintain a patent, and they will deny enforcement of private arrangements and claims intimately connected with such misconduct.
No. AMMCO's knowing suppression of perjury in the Patent Office tainted its claims. Under the unclean hands doctrine, the Court barred AMMCO from obtaining equitable relief to enforce rights dependent on the tainted proceedings and directed dismissal of its claims.
The Court emphasized that patents are public franchises conferring limited monopolies, and their procurement and enforcement implicate the public interest. Thus, equity demands scrupulous candor in dealings with the Patent Office. AMMCO and its counsel learned that Precision's assignor had committed perjury to antedate a rival claim in the interference proceedings. Instead of revealing this to the Patent Office, AMMCO used the information as a bargaining chip to secure a settlement that facilitated issuance of patents while keeping the fraud concealed. That suppression corrupted the administrative process and undermined the public's interest in ensuring that patent monopolies are granted only upon truthful disclosures. Applying the unclean hands doctrine, the Court reasoned that equitable relief must be denied where the plaintiff's own misconduct is directly related to the matter in litigation. AMMCO's claims rested on the very patents and settlement that were the fruits of the suppressed perjury. Because the misconduct bore an immediate and necessary relation to the relief sought, equity would not lend its aid. The Court stressed that this principle applies not just to the original wrongdoer in the Patent Office but also to any party who knowingly aids, abets, or suppresses evidence of the wrongdoing. Permitting enforcement in such circumstances would encourage private manipulation of the patent process and denigrate the duty of disclosure owed by applicants and their attorneys. Given these considerations, the Court reversed and directed that AMMCO's complaint be dismissed without reaching ancillary questions.
Precision Instrument is a foundational case for the unclean hands doctrine in patent law and the modern duty of candor to the Patent Office. It teaches that courts will deny equitable relief where the plaintiff's conduct compromises the integrity of the patent system—whether or not the plaintiff originally committed the fraud—if the plaintiff knowingly suppressed it. The case is frequently cited alongside Keystone Driller and Hazel-Atlas to underscore that private settlements cannot sanitize or conceal fraud on the Patent Office and that the public interest in the patent system's integrity overrides parties' private bargains. For law students, it illuminates the intersection of equity and intellectual property, the ethical duties of attorneys before administrative agencies, and the remedial consequences—dismissal and nonenforcement—when those duties are breached.
Precision Instrument reinforces that the patent system's legitimacy depends on the utmost candor from applicants and their counsel. When a party knows of perjury or fraud in the Patent Office and uses that knowledge as leverage while concealing it, the taint extends to the fruits of the bargain. Equity will not act in service of such conduct, particularly where the public interest in the proper issuance of patent monopolies is at stake.