Patents by Inventor Elwin B. Johnson

Elwin B. Johnson 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: 5925274
    Abstract: An electric range override timer unit including an electrically controllable power interrupt circuit positioned between a conventional male power plug adapted for connection with an existing electrical wall socket and a socket assembly adapted for receiving the male plug from an existing electric range; a timer unit in electrical connection with the power interrupt circuit, the timer unit having a timing mechanism having a predetermined maximum time period for sending a control signal to the power interrupt circuit for causing the power interrupt circuit to conduct electrical current between the conventional male power plug and the socket assembly; and a mounting bracket having a first portion secured to the timer unit and a second portion adapted for multiple connecting modes to an existing electric range.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: July 20, 1999
    Inventors: Duane M. McKinney, Elwin B. Johnson