Patents by Inventor Donald L. Agnew

Donald L. Agnew 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).

  • Circuit for powering fluorescent lamps
    Patent number: 4008414
    Abstract: A circuit employing an oscillator having a feedback loop for supplying operating current at a frequency in the range 20-25 kilohertz to a pair of fluorescent lamps connected in series. The heater filament of the first lamp is made a series element in the feedback loop of the oscillator, so that removal of that lamp disables the oscillator. Switching means is provided to bypass the open socket terminals of the second lamp when it is removed from its sockets, permitting power to continue to be supplied to the first lamp.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: February 15, 1977
    Assignee: Power Saver Corporation
    Inventor: Donald L. Agnew