Patents by Inventor Benjamin J. Perkinson

Benjamin J. Perkinson 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: 4153970
    Abstract: A door handgrip having means for obtaining a fingerprint of the next person using the door, as a bank robber or a law breaker. For this purpose the grip is provided with a pair of fingergrip surfaces one of which is in normal use and the other of which is print-free and normally shielded from use. Remote control means is operable to replace the normally used gripping surface with the print-free surface thereby to obtain the fingerprints of the next person using the grip.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: May 15, 1979
    Inventor: Benjamin J. Perkinson