Patents by Inventor Norbert C. Vollmann

Norbert C. Vollmann 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).

  • Magnetic-tape cassette
    Patent number: 5074486
    Abstract: A magnetic-tape-cassette (1) comprises tape guides (34, 35), which are arranged on a resilient element (40) and is constructed for cooperation with an apparatus (2) comprising a magnetic-head unit (4) and further tape guides (6, 7). During cooperation with the apparatus (2) the tape guides (34, 35) are situated between the further tape guides (6, 7) of the cassette. This provides an additional guidance of the magnetic tape (3) at the location of the magnetic-head unit (4), thereby improving the contact between the magnetic tape (3) and the magnetic head (5).
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: December 24, 1991
    Assignee: U.S. Philips Corporation
    Inventor: Norbert C. Vollmann
  • Digital compact cassette
    Patent number: D331235
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: November 24, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Peter J. Doodson, Norbert C. Vollmann