Patents Assigned to Daniel R. Oberan
  • Validity signal apparatus for monitoring a line boundary
    Patent number: 4528548
    Abstract: Apparatus for determining the validity of a kill shot in racketball or handball, or the like, or of an "out" ball in tennis includes light beam arrays and the interruption of one or more light beams and the timing involved in the interruption is used to provide an appropriate signal.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: July 9, 1985
    Assignee: Daniel R. Oberan
    Inventor: Stephen L. Oberan