Patents by Inventor Douglas B. Morphew

Douglas B. Morphew 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).

  • Trailer illumination system test drive and method of use
    Patent number: 7345579
    Abstract: A trailer illumination system test device and method of use are disclosed. In one form, a device for testing the functionality of a trailer lighting system is disclosed. The device includes an in-series connection port operable to receive a trailer lighting system plug and a series of trailer light switches operable to simulate an operating condition of a trailer in tow. The device further includes an external power source connection operable to couple an external power source to provide power to simulate the operating condition.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: March 18, 2008
    Inventors: Carl A. Nelson, Douglas B. Morphew