Patents by Inventor Sam Cheng

Sam Cheng 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: 4764128
    Abstract: Distribution hanger for decorative light strings comprises: a distribution box made of insulation material, a power inlet plug, conductor wires connected within the box to provide a plurality of outlet sockets and/or connectors for lamp seat, for distribution or cascading string sets thereof, and a hanging hook or ring made integrally with the box; advantageously, the lid of the box is also made integral. The hanger gives synergetic effects of interest and variation.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: August 16, 1988
    Inventor: Sam Cheng
  • Patent number: 4667276
    Abstract: A lamp string assembly comprises the following elements: plug, insulated lead wire, lamp socket, lamp bulb, lamp shade or shield, an extension socket and a protective means which is provided to cover the lamp socket and to connect with the lamp shade or shield to envelope the wires and to ensure steadiness, water proofing and safety.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: May 19, 1987
    Inventor: Sam Cheng
  • Patent number: 4425605
    Abstract: A decorative lighting string set assembly comprising a plug, an overcurrent protective device and a plurality of bulbs in series or parallel connection, one terminal of the overcurrent protective device is connected to the plug with larger conductors and the other is connected to bulbs with smaller conductors for input of power. The overcurrent protective device may be a stationary or a replaceable structure.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: January 10, 1984
    Inventor: Sam Cheng