Patents by Inventor Forrest Hannan

Forrest Hannan 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).

  • Cassette locking system
    Patent number: 4801107
    Abstract: A conventional reel brake in a video cassette is modified so that it will not function to release the brake when the cassette is placed in a cassette player unless a disabling device in the cassette is first unlocked or reset by external means. Further, when the cassette is unlocked and allowed to be played, it is once more disabled when the cassette is removed from the player. Thus, the cassette must be once more reset or unlocked before it can be played again.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: January 31, 1989
    Assignee: Sotar, Inc.
    Inventors: Dale A. Dixon, Forrest Hannan