Patents by Inventor Philip L. Chang

Philip L. Chang 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: 5342054
    Abstract: A golf practice apparatus provides recording and instant playback of video images of a golfer's swing. A plurality of color video cameras are preferably employed to obtain video images of a swing from different angles. A video processing and storage unit digitally stores the images in memory for instant replay. Image processing and recording is automatically initiated when a golf ball is placed on a designated hitting area through the use of an infrared camera and image processing software that detects a golf ball in the IR camera's image. The IR camera is also used in conjunction with an IR flash unit to obtain snapshot images of a club head and ball just before and just after the golf club hits the ball. An optical sensor array is positioned adjacent the hitting area to detect the passage of a golf club toward the ball. The signals generated by the optical sensor array are employed by the image processing and storage unit to both calculate the club speed and control triggering of the flash unit.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: August 30, 1994
    Assignee: Timecap, Inc.
    Inventors: Philip L. Chang, Gary S. Flood, Kent W. Kirkes, Edwin R. Smith
  • Patent number: D437626
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: February 13, 2001
    Assignee: Swing Solutions
    Inventor: Philip L. Chang
  • Patent number: D437909
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: February 20, 2001
    Assignee: Swing Solutions
    Inventor: Philip L. Chang