Patents by Inventor Roy Libby

Roy Libby 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).

  • Mail bag rack
    Patent number: 4921194
    Abstract: To enable mail bags to be disengaged from a bag rack without lifting, bag hooks are provided with a constant radius curvature about a pivotal axis and are equipped with a handle for enabling them to be rotatively manually biased so that when used alone or in conjunction with fixed top bag supporting posts, a filled mail bag may be released from a bag rack and closed without requiring strenuous physical exertion on the part of a postal worker.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: May 1, 1990
    Inventor: Roy Libby
  • Bowling alley accessory
    Patent number: 4770419
    Abstract: A portable monorail accessory with traversable carriage for use by blind bowlers to align themselves with a bowling alley in preparing to bowl a ball is described.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: September 13, 1988
    Inventor: Roy Libby