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Hemstreet v. Burroughs Corp.

Citations: 666 F. Supp. 1096; 6 U.S.P.Q. 2d (BNA) 1971; 1987 U.S. Dist. LEXIS 6424Docket: 81 C 6412

Court: District Court, N.D. Illinois; July 7, 1987; Federal District Court

Narrative Opinion Summary

In a patent infringement lawsuit, the plaintiff accused Burroughs Corporation and Harris Trust and Savings Bank of infringing U.S. Patents related to character recognition technology. The plaintiff alleged infringement through Burroughs' products used by Harris Bank for check sorting. The court reviewed claims of inequitable conduct, focusing on the plaintiff's failure to disclose pertinent prior art, such as a critical text on high-speed computing and several patents, to the Patent and Trademark Office (PTO). The defendants moved for summary judgment, asserting that the plaintiff's omissions and false statements constituted inequitable conduct, making the patents unenforceable. The court, applying standards under 37 C.F.R. 1.56(a) and relevant case law, found clear and convincing evidence of both materiality and intent to deceive. Consequently, the court granted summary judgment for the defendants on inequitable conduct grounds, deeming the patents unenforceable. The decision also highlighted that inequitable conduct affecting one patent may render related patents unenforceable if they share origins or technological similarities. The plaintiff's motion for reconsideration was denied, and the court ordered the dismissal of the complaint with prejudice, alongside cost-sharing for expert fees.

Legal Issues Addressed

Duty of Disclosure under 37 C.F.R. 1.56(a)

Application: The plaintiff and his attorney's actions violated the duty of disclosure by failing to inform the PTO of material prior art, thus demonstrating intent to deceive.

Reasoning: Individuals involved in the preparation or prosecution of a patent application have a duty to disclose material information to the Office, defined as information that a reasonable examiner would likely find important in deciding on the application.

Impact of Inequitable Conduct on Related Patents

Application: Inequitable conduct affecting one patent can render related patents unenforceable, as demonstrated by the same application origins and technological similarities.

Reasoning: Additionally, previous cases established that inequitable conduct affecting one patent can impact others, as seen in Keystone Driller.

Materiality and Intent in Inequitable Conduct

Application: The court found clear and convincing evidence of both materiality and intent to deceive the PTO, meeting the threshold for inequitable conduct.

Reasoning: Threshold materiality and intent have been established by clear and convincing evidence, with no factual disputes present.

Patent Infringement and Inequitable Conduct

Application: The court found that the plaintiff's failure to disclose relevant prior art and false statements made to the Patent and Trademark Office constituted inequitable conduct, rendering the patents unenforceable.

Reasoning: Defendants allege that the plaintiff failed to disclose certain prior art and made false statements to the PTO regarding this art, focusing on four specific items: a text on high-speed computing, Hillyer Patent No. 2,679,636, King Patent No. 3,469,263, and Shepard Patent No. 2,663,758.

Summary Judgment in Patent Cases

Application: The court granted summary judgment on the basis of inequitable conduct, determining no genuine issue of material fact existed due to clear evidence of intent to deceive.

Reasoning: Summary judgment is appropriate in patent cases, as noted by the Federal Circuit, to avoid unnecessary costs and judicial resource waste.