Patents by Inventor Robert H. Andrews

Robert H. Andrews 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).

  • Quiet relay
    Patent number: 4460881
    Abstract: An electro-mechanical relay, particularly for automotive use, characterized by quietness of operation in which the armature coil, spring arm and contact elements are so arranged that the mating surfaces of the contact elements lie substantially in a single plane when in open position and are closed without audible noise by relative sliding movement in said plane.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 17, 1984
    Inventors: Jack B. Meister, Stephen P. Beard, Robert H. Andrews