Patents by Inventor Clifford J. Griffin

Clifford J. Griffin 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: 6252966
    Abstract: An artificial larynx includes a case containing a circuitboard subassembly, a battery subassembly, a transducer subassembly, and a switch subassembly that are interconnected to function as means for producing an artificial larynx tone. A radially inwardly extending flange component is bonded with glue or other suitable bonding agent to the cylindrically shaped interior wall of a central case component to provide a screw-less circuitboard mounting stop component for stopping the circuitboard from moving forwardly within the central portion of the case interior in response to battery terminals bearing against a set of rearwardly facing battery connectors on the circuitboard.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: June 26, 2001
    Assignee: Griffin Laboratories
    Inventor: Clifford J. Griffin
  • Patent number: 5812681
    Abstract: An artificial larynx of the type having a case and a battery-powered, tone-producing, electrical circuit within the case, includes control components for enabling a user to turn on the circuit and vary the frequency of the tone. The turn-on control components include a switch having a switch actuator and a pushbutton or other suitable depressor component, while the frequency-control components include a pressure-sensitive resistor (PSR) electrically connected in the circuit and physically disposed intermediate the depressor component and the switch actuator.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: September 22, 1998
    Inventor: Clifford J. Griffin