Patents Assigned to Bert O. Jonsson
  • Object sensing apparatus for an automatic door
    Patent number: 4560912
    Abstract: An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: December 24, 1985
    Assignee: Bert O. Jonsson
    Inventor: Bert O. Jonsson