Patents by Inventor Robert L. Spence

Robert L. Spence 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).

  • Spool retaining device
    Patent number: 4534522
    Abstract: A device that is placed upon a large spool of line or other wound material to control the alignment of the line as it is unwound therefrom comprising a first means defining an aperture through which the unwinding line passes and second means for holding said first aperture loosely adjacent about the outer windings intermediate the ends of the spool to allow it to slip around the spool during unwinding.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: August 13, 1985
    Inventor: Robert L. Spence