Patents by Inventor Robert C. Spellman

Robert C. Spellman 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).

  • Patent number: 3991736
    Abstract: Two reciprocating pistons in opposite cylinders connected by a shaft that fears ratchet nuts that engage and drive a flywheel which may drive another device.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: November 16, 1976
    Assignee: The Raymond Lee Organization, Inc.
    Inventor: Robert C. Spellman