Patents by Inventor Blythe J. Robertson

Blythe J. Robertson 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).

  • Magnetic hammer
    Patent number: 4291736
    Abstract: A magnetic hammer having a handle and a hammer body coupled to the handle includes a cylindrical magnetic insert having first and second ends with the magnetic poles of the insert being aligned with the central axis of the insert. A cylindrical retainer having first and second ends includes a cylindrical chamber which is sized to receive and retain the magnetic insert. The axis of the magnetic insert is aligned with the axis of the cylindrical retainer and the first end of the magnetic insert and the first end of the cylindrical retainer form the hammering face of the hammer. The second end of the cylindrical retainer is coupled to the hammer body.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: September 29, 1981
    Assignees: Alan D. Robertson, Blythe J. Robertson
    Inventors: Alan D. Robertson, Blythe J. Robertson, Gerald Olson