Patents by Inventor Fong Pui

Fong Pui 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).

  • Electronic chirper
    Patent number: 3971016
    Abstract: An audio frequency signal generating circuit for producing repeated tones that includes a pair of transistors. The first transistor has its collector connected to a voltage supply line, has a capacitor connected between its emitter lead and earth, and also has an inductance connected to its emitter lead. The collector of the second transistor is connected to the other side of the inductance and the emitter is connected to the other side of the supply. The first transistor has biasing means to bias it into an operating condition and the second transistor is arranged with reactive feedback to cause oscillation.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: July 20, 1976
    Assignee: Playart Ltd.
    Inventor: Fong Pui
  • Wrist watch movement holder
    Patent number: D461737
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: August 20, 2002
    Assignee: Fossil, Inc.
    Inventor: Tony Fong Pui Ching