Patents by Inventor Jack Maan

Jack Maan 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).

  • Patent number: 5011419
    Abstract: A safety socket includes a cover plate having an opening, a spring-biased stepped plate, and a base plate having a first recessed portion for fixedly receiving the cover plate and a second recessed portion within which the stepped plate is slidable. Both the stepped plate and the base plate include a respective pair of hot slots. The stepped plate includes a raised plate which is designed to cooperate with the opening of the cover plate so that the raised plate is displaceable within the opening of the cover plate from a safety position, where the pair of hot slots on the stepped plate blocks the pair of hot slots on the base plate, to a work position, where the two pairs of hot slots are aligned for receiving a plug.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: April 30, 1991
    Inventor: Jack Maan