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Patent Invalidation Case: Wintermute v. Hermetic Seal by Scribd Government Docs is a document available to read on EtoBox.

The plaintiff sued to enjoin infringement of his patent for a hermetically sealed housing for piezoelectric crystals. The district court found the patent invalid. On appeal, the appellate court affirmed, finding that while the sealed housing was useful, it did not meet the standard for a patentable invention. Prior art already taught hermetic sealing and using materials like Kovar and glass with matched thermal expansion coefficients. A skilled mechanic could have created the sealed housing without exercisi

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Scribd Government Docs

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EN