Patents by Inventor Dale E. Bradham

Dale E. Bradham 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).

  • HID lamp with multiple discharge devices
    Patent number: 4958103
    Abstract: A high intensity discharge lamp having a pair of discharge devices with one of them initially operative. The discharge devices are laterally adjacent with the higher temperature end of the operative discharge device proximate the lower temperature end of the inoperative discharge device for heating it during lamp operation. This facilitates starting of the inoperative discharge device after a momentary power interruption.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: September 18, 1990
    Assignee: North American Philips Corp.
    Inventors: Cornelis A. Jacobs, Norman R. King, Dale E. Bradham