Patents by Inventor Ralf Kreibich

Ralf Kreibich 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).

  • Sprung contact pin for testing testpieces
    Patent number: 5014004
    Abstract: The disclosure teaches a sprung contact pin for testing testpieces, in particular electrical printed circuit boards, including a casing, a coil spring disposed therein, a portion of a testing tip which projects axially out of the casing and which is movable against the force of the coil spring, and at least one further storage means associated with the coil spring.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: May 7, 1991
    Assignee: Ingun Prufmittelbau GmbH
    Inventors: Ralf Kreibich, Michael Topp