Patents by Inventor Frank U. Zimmerman

Frank U. Zimmerman 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).

  • Portable circuit testing system
    Patent number: 4329643
    Abstract: A portable system for testing and adjusting security alarm system modules where an alarm module is removed from the security system and inserted into the test system, an adapter card, connected to the test system, replaces the module, whereby the alarm system continues to function normally, the alarm circuit is then tested for voltage, current and continuity and necessary adjustments made.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: May 11, 1982
    Inventors: Manfred H. Neumann, Gunter H. Wallstab, Lutz R. Heike, Frank U. Zimmerman, Lawrence A. Durante