Patents Assigned to Topp Electronics, Inc.
  • Electronic clock
    Patent number: 4026102
    Abstract: A numerical display unit formed by light emitting diode segments, is directly driven by the field effect transistors associated with an integrated timer circuit chip. A DC driving current is supplied to common electrodes of the transistors while the light emitting diodes are interconnected in a corresponding common electrode arrangement so that the same driving current is conducted through each of the transistors and associated light emitting diodes.
    Type: Grant
    Filed: March 18, 1975
    Date of Patent: May 31, 1977
    Assignee: Topp Electronics, Inc.
    Inventor: Leon S. Wecker