Patents by Inventor John F. Olson

John F. Olson 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).

  • Warning light synchronization
    Patent number: 6376996
    Abstract: The gating of energizing current flow to a relatively low intensity light source is controlled by monitoring the flow of energizing current to an associated strobe light. The controller produces gating control pulses which lead the strobe energization signals to thereby cause the strobe generated light to be superimposed on light from the low intensity source.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: April 23, 2002
    Assignee: Whelen Engineering Company, Inc.
    Inventor: John F. Olson
  • Rear facing light bar
    Patent number: 5988839
    Abstract: A rear facing light bar for a passenger vehicle comprises a housing shaped to define a rearwardly directed roof extension which increases in depth in the downstream direction. The housing is permanently attached to the vehicle and supports, behind an outer lens, a linear array of individually controllable lights which are rearwardly directed.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: November 23, 1999
    Assignee: Whelen Engineering Company, Inc.
    Inventors: William J. Pokorney, John F. Olson, Jon H. Lyons, Robert B. Ford
  • Housing for a control for an electronic siren
    Patent number: D273470
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: April 17, 1984
    Assignee: Whelen Engineering Co., Inc.
    Inventor: John F. Olson
  • Aerodynamic rear facing light bar for emergency vehicles
    Patent number: D419249
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: January 18, 2000
    Assignee: Whelen Engineering Company, Inc.
    Inventors: Robert B. Ford, Jon H. Lyons, John F. Olson, William J. Pokorney