Patents by Inventor Reinhard Sprenger

Reinhard Sprenger 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).

  • Method for producing helically wound filament elements, and filament elements produced according to this method
    Patent number: 6161598
    Abstract: A method for producing helically wound filament elements, and filament elnts produced according to this method. The method is distinguished in that a thermal treatment of the incandescent wire at temperatures of over 1200.degree. C. takes place already before the winding of the incandescent wire, so that, after separation, the coil springs open and can easily be detached from the core wire.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: December 19, 2000
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Juergen Eder, Hans Liermann, Peter Schmidt, Reinhard Sprenger