Patents by Inventor Rudolf P. Kreisfeld

Rudolf P. Kreisfeld 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).

  • Weatherstrip
    Patent number: 4419844
    Abstract: A weatherstrip is formed by a process of multiple extrusion to have sponge which extends from a free sealing end to a captive end, and on each side of the sponge at the captive end there is a respective extrusion of dense rubber flanking a reduced thickness portion of the sponge.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: December 13, 1983
    Assignee: Bridgestone Australia Pty. Ltd.
    Inventor: Rudolf P. Kreisfeld