Patents by Inventor John Worrall Berkman

John Worrall Berkman 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: 3989210
    Abstract: A cable clamp and strain relief device is formed as a single piece from sheet material with a turned spring arm which provides a cable retaining, strain relieving function and a pair of depending leg members formed by flanging material at each transverse margin. The leg members each terminate in a turned distal end and are received in a pair of apertures in a cooperating plate. The terminal part of the distal end has a central tab with shoulders at each side such that normally the central tab springs out beneath the lower surface upon insertion through the apertures, but when insertion is restricted the shoulders may engage the plate lower surface adjoining the aperture to retain the clamp.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: November 2, 1976
    Assignee: International Business Machines Corporation
    Inventors: John Worrall Berkman, Frederic Cyrus Pexton