Patents by Inventor Leonard R. Christensen

Leonard R. Christensen 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: 4348715
    Abstract: A lighted tool holder for releasably holding a variety of tools, such as screw drivers, including an elongated hand-held hollow body having a centrally mounted light bulb therein with plural batteries axially shiftable into electrical contact with the bulb. The batteries and light bulb are held in position by a single spring wire spiraled around the base of the light bulb and surrounding the batteries and engaging one of the battery grounds to provide the ground wire circuit for battery actuation.The releasable tool is rigidly held in position by a cylindrical adapter mounted in the working end of the tool holder body. This adapter has integral frusto-conical segmented base members, fixed within the hollow body to support the adapter and also permit light to pass through the adapter where it is diffused by reflectors and passed through a cup-like lens on the end of the tool holder body which provides edge lighting.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: September 7, 1982
    Inventors: Leonard R. Christensen, Hiroshi Horibata