Patents by Inventor Christopher S. Keenan

Christopher S. Keenan 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: 5355752
    Abstract: A screwholder adapted to be mounted over a screwdriver shank that includes an outwardly flared blade section adjacent a screwdriver tip is disclosed. The screwholder includes a hollow extension tube that mounts over the screwdriver shank. One end of the hollow extension tube has an enlarged section for engagement and displacement along the screwdriver shank by the thumb of a user. The other end of the hollow extension tube includes screw gripping fingers for gripping a screw. The screw gripping fingers extend upwardly from the hollow extension tube and are captured between an inner retaining plate and an outer housing. The screw gripping fingers further have outer free ends for gripping opposed areas of a screw. A compressible spring is positioned within the outer housing between the inner retaining plate and the hollow extension tube.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: October 18, 1994
    Assignee: Emerson Electric Co.
    Inventors: Christopher S. Keenan, Joseph N. Varnell, III
  • Patent number: D358312
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: May 16, 1995
    Assignee: Emerson Electric Co.
    Inventor: Christopher S. Keenan
  • Patent number: D358313
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: May 16, 1995
    Assignee: Emerson Electric Co.
    Inventors: Michael Czarniecki, Christopher S. Keenan