Patents by Inventor Louis B. Villarreal

Louis B. Villarreal 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).

  • Doorknob attachment
    Patent number: 5725264
    Abstract: A device for attaching to a doorknob and a method for attaching the device to the doorknob, the device comprising a body having two arms and an elongated handle member with a removed end and a near end, a pin extending from the body between the two arms, and fastener means for engaging the surface of the doorknob after the pin has been inserted therein for holding the body to the doorknob.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: March 10, 1998
    Inventor: Louis B. Villarreal