Patents by Inventor John G. Hamilton

John G. Hamilton 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: 10625144
    Abstract: A hand-held battery powered tool used for tip shaping and reshaping a tip on a cue stick used for playing pool, billiards, snooker, etc. The tip is shaped by a mounting a rotating concave abrasive adapter that is powered in a hand-held housing that allows a user to center the tip directly into the center of the concave abrasive attachment for precise shaping accuracy in seconds. The abrasiveness of the attachment is equal to 80 grit sand paper, although grits from 60 to 120 grit may also be used. The size of the opening at the front end of the housing also allows a user to angle the cue to shape the side walls of the tip to further correct the curvature of the tip. Finally, a burnisher is also provided at the back of the housing to put a final finish on the tip.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 21, 2020
    Inventor: John G. Hamilton
  • Patent number: 4957038
    Abstract: A ventilator device (9A) is provided at the side frame (36, 37) of a door (35), especially at the top door standard (37), and comprises a box structure (42) defining a through-conduit for ventilating air, and closed at this ends e.g. by caps (15). The box structure is preferably of L-shaped cross-section so providing an abutment surface (43) for the door. An air-flow control (21, 22) can be provided.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: September 18, 1990
    Inventor: John G. Hamilton
  • Patent number: D262235
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: December 8, 1981
    Inventor: John G. Hamilton
  • Patent number: D262313
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: December 15, 1981
    Inventor: John G. Hamilton