Patents by Inventor Rudolph Janda

Rudolph Janda 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: 5894175
    Abstract: A photo-control apparatus comprising a photo-control circuit that includes two or more photo-cells connected in parallel that respond to ambient light. The circuit includes a switch that connects a power source to a load. When the photo-cells are exposed to ambient light, current flows through the parallel photo-cells operating the switch which disengages the load from the source. The plural parallel photo-cells in the photo-control circuit provide for improved reliability and have the potential to cost less to manufacture than a single photo-cell as used in a conventional photo-control circuit.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: April 13, 1999
    Assignee: Intermatic Incorporated
    Inventors: Donald Berlin, Rudolph Janda, Steve Baker