Patents by Inventor Joern Friese

Joern Friese 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).

  • Lock ring for tape-like recording media wound as a roll of tape, in particular magnetic tapes
    Patent number: 5133456
    Abstract: A lock ring for tape-like or strip-like recording media wound as a roll of tape, in particular magnetic tapes, is provided with one or more resilient pressure elements for the free tape beginning. The pressure element can be advantageously used both in conjunction with an automatic self-threading ring and with conventional lock ring-only systems.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: July 28, 1992
    Assignee: BASF Aktiengesellschaft
    Inventor: Joern Friese