Patents by Inventor Larry J. Graham

Larry J. Graham 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).

  • Presence delector for controlling an electric range
    Patent number: 5380985
    Abstract: An apparatus for controlling an electric range having a plurality of range top heating elements includes a detector which reacts to a person being within a predetermined distance in front of the electric range. The detector is mounted inside the range and has input and output voltages of 110-120 volts AC. An electromagnetic switch mounted inside the range is activated by the detector to automatically disconnect power to the range when the range has been unattended for a predetermined period of time. The detector is electrically connected to a range top heating element to obtain its input voltage.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: January 10, 1995
    Inventor: Larry J. Graham