Patents by Inventor Robert E. Keefer

Robert E. Keefer 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: 5117666
    Abstract: A housing includes a top and bottom plate in a spaced parallel coextensive relationship integrally secured together pivotally mounting a first and second key holder at opposed ends of the plate, wherein the key holder includes pivotal axles orthogonally oriented to each of the plates and parallel relative to one another. The key holders are spring biased for rotation between the plates and are maintained in a first position by a latch mechanism and released to a second position upon release of the latch mechanism to include a lever, with a lever engaging a projection in a respective key holder.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: June 2, 1992
    Inventor: Robert E. Keefer