Patents Assigned to Plus4 Engineering, Inc.
  • Golfing apparatus
    Patent number: 5486002
    Abstract: A golfing apparatus for estimating the carry distance of a struck golf ball includes a doppler radar unit, a correlating circuit and a display. The doppler radar unit measures the doppler shift of the struck golf ball and a predetermined, empirically derived factor is used to correlate the measured doppler shift to an estimated carry distance for the ball. The display shows the estimated carry distance.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: January 23, 1996
    Assignee: Plus4 Engineering, Inc.
    Inventors: James L. Witler, Douglas L. Spike, Douglas C. Talbot