Patents by Inventor Alan C. Chu

Alan C. Chu 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).

  • Paint brush with replaceable head
    Patent number: 5359749
    Abstract: A paint brush with replaceable head comprises a handle (1) and a bristle portion (2) detachably secured to the handle by a removable pin (6). The bristle portion consists of bristles (5) fixedly mounted onto the lower end of a retaining member (4) by adhesives (8).
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 1, 1994
    Inventor: Alan C. Chu
  • Bamboo board
    Patent number: 4810551
    Abstract: A bamboo board comprising a number of longitudinal layers (4) and a number of lateral layers (5). The longitudinal layer is made by longitudinal bamboo strips (1) bonded together with adhesives (3), and the lateral layer is made by lateral bamboo strips (2) bonded together with adhesives (3). During assembly, the longitudinal layers and lateral layers are laid over alternately, with strips of each layer at right angles to those of adjacent layers, and bonded by adhesives (3) in between to become said bamboo board.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: March 7, 1989
    Inventor: Alan C. Chu
  • Electrical plug with molded on prongs and detachable wire loops
    Patent number: 4792309
    Abstract: An electrical plug comprises a body (1) molded with prongs (2) and detachably secured with a cover (10). Each of the prongs is detachably connected to an electrical wire (11) by means of tying a loop (13) at the bare end of said wire, and slipping said loop into a spring clamp (3) formed on the prong. The connection of said wire to said prongs is made before attachment of said cover.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: December 20, 1988
    Inventor: Alan C. Chu
  • Animal trap with rotative tangential doors
    Patent number: 4688348
    Abstract: An animal trap with rotative tangential doors comprises a main body (1) of open tubing pivoted with rotative tangential doors (2) which are positioned at each of said main body's two openings. Each door is controlled by a latch (4) located at the top of the tubing. At the middle of the body a trigger (3) is suspended by a clamp which is made by hooking both latches with a spring (6). When an animal steps on the lower rim of the trigger, its weight will cause the trigger to drop, thus causing movement of both latches and the simultaneous closing of both doors. The trap is provided with a pair of instant door locks (5) which would prevent the reverse rotation of each of the doors.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: August 25, 1987
    Inventor: Alan C. Chu
  • Paint brushes
    Patent number: 4494268
    Abstract: A paint brush comprises a handle (1) and a bristle portion (2) detachably secured to the handle (1). The bristle portion consists of bristles (5) fixedly mounted in a retaining member (4) which is received in a hollow portion (11) of the handle. A pair of resilient arms (6) are provided on the retaining member and are formed with projections (8) which engage in the hollow portion of the handle.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: January 22, 1985
    Inventor: Alan C. Chu
  • Double hole brush handle
    Patent number: D273636
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: May 1, 1984
    Inventor: Alan C. Chu