Patents by Inventor Randall B. Walker

Randall B. Walker 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).

  • Structural element with interlocking ribbing
    Patent number: 5273806
    Abstract: A structural element comprising opposed first and second, laterally and longitudinally extended, generally planar surface structures each having a closed figure pattern of ribbing projecting therefrom toward the opposite surface structure, the ribbing being of respective heights to bridge the space between the surface structures, the opposed ribbing being interlocked in registered, mating relation.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: December 28, 1993
    Inventors: James J. Lockshaw, Stephen R. Kelly, Randall B. Walker, John Kaiser, Jr.
  • Theft deterrent toilet roll spindles
    Patent number: 4212434
    Abstract: A theft deterrent toilet tissue spindle, the spindle having an axially movable stem received in a conventional holder for movement between a spindle retaining and a spindle releasing position; the spindle having an access slot for receiving a tool engageable with the stem to release the spindle; the access slot being concealed by the cardboard core of the toilet tissue roll and requiring tearing of such core from the spindle in order to remove the spindle from its holder.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: July 15, 1980
    Assignee: The Bobrick Corporation
    Inventor: Randall B. Walker