Patents by Inventor Holger Persson

Holger Persson 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).

  • Timer switch assembly
    Patent number: 3935404
    Abstract: A device for randomizing the operation of an electrical switch such that it can be used to switch electrical devices at random time intervals. This device uses a mechanism which periodically disconnects a drive train from a motor, randomizes the position of the drive train, and uses the resultant position of the mechanism to trip an electrical switch.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: January 27, 1976
    Inventor: Holger Persson