Patents by Inventor Walter B. Parkes

Walter B. Parkes 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: 5374852
    Abstract: A lighting control apparatus for a motor vehicle, the motor vehicle having an electrical power supply, an ignition switch, lights, a lighting control switch for illuminating the lights, a wiper device, and a wiper control switch for actuating the wiper device, the lighting control apparatus automatically illuminating the lights whenever the wiper device is actuated, the lighting control apparatus including a photosensitive element electrically connected in series between the electrical power supply and the lights, the photosensitive element being illuminated by ambient light, the photosensitive element having a first substantially conductive state whenever the intensity of the ambient light is below a first threshold value, the photosensitive element additionally having a second substantially nonconductive state whenever the intensity of the ambient light exceeds a second threshold value, a shutter member movable between a first position substantially shielding the photosensitive element from the ambient ligh
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: December 20, 1994
    Inventor: Walter B. Parkes