Patents by Inventor Peter J. Topham

Peter J. Topham 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).

  • Bipolar junction transistor combined with an optical modulator
    Patent number: 5249074
    Abstract: A combined bipolar junction transistor and an optical modulator comprising a plurality of semiconductor layers providing an optical mirror for the modulator, a collector for the transistor formed upon the plurality of semiconductor layers, the collector also forming an optical absorber of the modulator, a base of the transistor formed upon the collector, an emitter of the transistor formed upon the base and a metallic contact for the base, the metallic contact providing a function of an optical reflector for the modulator.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: September 28, 1993
    Assignee: GEC-Marconi Limited
    Inventor: Peter J. Topham