Patents by Inventor Herman Adrianus Goderfridus Severinus Smulders

Herman Adrianus Goderfridus Severinus Smulders 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).

  • Operating circuit for a gas and/or vapour discharge lamp
    Patent number: 4023066
    Abstract: An improved method of and apparatus for operating an electric discharge lamp which includes a controlled semiconductor switch connected in shunt with the lamp. By means of the semiconductor switch, the discharge lamp receives, when in operation, a plurality of voltage peaks, during every second half cycle of the AC supply voltage.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: May 10, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Herman Adrianus Goderfridus Severinus Smulders