Patents by Inventor Stephen M. Spencer

Stephen M. Spencer 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: 8141458
    Abstract: A hammer head includes a centrally located traction surface surrounded by a peripheral striking face. The portion of the hammer head forming the traction surface is comprised of a harder material than the surrounding portion of the hammer head, such that wear to the traction surface is inhibited. The centrally located region may be formed as a separate disk with a knurled outer surface that is press fit into a cavity formed in the hammer head main body. The traction surface is preferably recessed relative to the surrounding portion of the hammer head but may also extend flush therewith.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: March 27, 2012
    Inventors: Stephen M. Spencer, Richard A. Spencer