Patents by Inventor John D. Sperry

John D. Sperry has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Simplified precision tape cassette and system
    Patent number: 3987980
    Abstract: A tape recording deck employs a capstan, transducer, and precision tape guide all mounted in fixed aligned position and immovable during use. The cassette has a minimum of parts, none of which need high precision manufacture, and can be inserted into and removed from the deck with a unidirectional motion.
    Type: Grant
    Filed: April 24, 1972
    Date of Patent: October 26, 1976
    Assignee: Arvin Industries, Inc.
    Inventor: John D. Sperry