Patents by Inventor John E. Briggs

John E. Briggs 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: 5914775
    Abstract: A rangefinder includes an angle sensitive transducer and a programmed data processor to calculate the distance to a target. In one embodiment, the rangefinder also includes a point-to-point measuring device. Another embodiment provides a linear actuator to selectively move a sight indicator vertically. A yet additional embodiment includes a liquid crystal display which displays information to the user.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: June 22, 1999
    Assignee: Browning
    Inventors: Jeffrey B. Hargrove, John E. Briggs, William G. Wickham
  • Patent number: 5479712
    Abstract: An archery rangefinder for use from an elevated position comprises a power supply for an electronic digital panel meter and a power supply for two voltage divider circuits that comprise the rangefinding circuit. One voltage divider provides a voltage signal proportional to the elevation distance. This signal acts to supply the second voltage divider to attenuate the voltage further by a factor proportional to the tangent of the inclination angle. A weighted pendulum arm is attached to a potentiometric element in the second voltage divider to effect feedback relevant to the angle of inclination. All circuits and components are housed within an outer protective enclosure. Voltage across a fixed resistor in the second voltage divider is read and displayed by said digital panel meter as the range which is then used by the archer to increase accuracy of shots.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: January 2, 1996
    Inventors: Jeffrey B. Hargrove, William G. Wickham, John E. Briggs