Patents by Inventor Edward L. Stephens

Edward L. Stephens 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: 11209257
    Abstract: An optical primer for igniting an ignition material in an ammunition cartridge. The primer includes a conductive cylindrical cup electrically coupled to a cartridge case and a circular conductive button including a top button portion positioned in the cup and a bottom button portion extending through an opening in the cup, where the button and the cup are electrically isolated. The primer further includes a first bracket electrically coupled to the button, a second bracket electrically coupled to the cup, and a pair of laser diodes electrically coupled in a reverse parallel direction and being electrically coupled to the first and second brackets, where one of the laser diodes generate a laser beam that ignites the ignition material in response to a current flow in either direction through the case, the cup and the button.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: December 28, 2021
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Kevin L. Callan, Andrew M. Singleton, Ryan M. Crittenden, Michael L. Fisher, Wade Collins, Francis L. Struemph, Edward F. Stephens, IV
  • Patent number: 4999574
    Abstract: A tool for automotive technicians to use to diagnose electrical problems on automobiles. That is easer to use, faster, and far more accurate. This tool comprises of a case to hold probe, circuit, LED's and a means to connect said tool to an automobile. Two lights, first light to tell the operator the tool is ready for use and that the electrical connections to the storage battery are complete to the second light. Second light illuminates when said probe is in contact with automobile system and continuity of said circuit exists. A switch on said tester to select current direction of said tester. Tester circuit which is lower thatn 20 milli amps. when in series or parallel with the automotive circuit being tested.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: March 12, 1991
    Inventor: Edward L. Stephens