Patents Assigned to Photoron Incorporated
  • Method of electromagnetically reading coordinate data
    Patent number: 4554409
    Abstract: In an electromagnetic type digitizer system having a cursor coil and a tablet, the cursor position can be determined accurately by much a simplified method which basically uses a distribution curve of electromotive force induced by the cursor coil in the tablet.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: November 19, 1985
    Assignee: Photoron Incorporated
    Inventors: Kenji Mitsui, Akira Suzuki