Patents by Inventor Robert E. Spruill

Robert E. Spruill 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).

  • Winding reel
    Patent number: 4126285
    Abstract: A one-piece winding reel for fabric made from corrugated cardboard in which the corrugations are aligned with the center line of the reel. In one embodiment self-locking end-flaps are provided to eliminate the need for fastening materials. In a second embodiment the end-flaps are permanently affixed to the structure in an alternative securing means.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: November 21, 1978
    Inventor: Robert E. Spruill