Patents by Inventor Grant J. Harbertson

Grant J. Harbertson 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).

  • Electric outlet extender
    Patent number: 6004138
    Abstract: An electrical outlet extender with a male plug at one end to be connected into a wall outlet and a female electrical outlet at an opposite end and with one or more tubular members connected between the male plug and the female outlet.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: December 21, 1999
    Inventor: Grant J. Harbertson
  • Electric outlet extender
    Patent number: 5895275
    Abstract: An electric outlet extender with a male plug at one end to be connected into a wall outlet and a female electrical outlet at an opposite end and with a first tubular telescoping member rotatably connected to the male plug and a second telescoping member extending from the female outlet to telescope into the first telescoping member whereby the extender can be plugged into a wall outlet, turned to any desired angle and extended to desired length while hugging the wall.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: April 20, 1999
    Inventor: Grant J. Harbertson