Patents by Inventor Bruce H. Marshall

Bruce H. Marshall 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).

  • Electrical socket
    Patent number: 4085991
    Abstract: An electrical socket has a body with a pair of spaced-apart channels for receiving the prongs of a male electrical plug. A pair of electrical contacts are mounted in said body respectively adjacent to said channels and in communication therewith. A pair of legs are pivotally mounted on the body and are movable between locking and unlocking positions. Each leg carries a finger which enters the aperture of the prong on the associated electrical plug when the legs are in the locking position thereof.
    Type: Grant
    Filed: April 21, 1977
    Date of Patent: April 25, 1978
    Inventors: Bruce H. Marshall, Henry E. Blenner
  • Plug cap
    Patent number: 4060297
    Abstract: The plug cap has a body with a pair of spaced-apart channels for receiving the prongs of a male electrical plug. A pair of legs are pivotally mounted on the body and are movable between locking and unlocking positions. Each leg carries a finger which enters the aperture of the prong on the associated electrical plug when the legs are in the locking positions thereof.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: November 29, 1977
    Inventors: Bruce H. Marshall, Henry E. Blenner