Patents Assigned to Data Stream Corporation
  • Wireless input system for computer using elevated four-division photodetector
    Patent number: 5585619
    Abstract: A wireless input system for a computer includes a pen-type input device and an input device body. The pen-type input device comprises a light emitting element for emitting a pulse of light. The input device body comprises at least one optical system unit including a light receiving element for receiving the pulse of light emitted from the light emitting element of the pen-type input device and a circuit for calculating the outputs from the light receiving element to obtain the position abscissa of the pen-type input device.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: December 17, 1996
    Assignee: Data Stream Corporation
    Inventors: Hideo Goto, Manabu Fujita
  • Wireless pen-type input device for use with a computer
    Patent number: 5166668
    Abstract: A wireless input device for computer comprises a pen-type input device having a source of light capable of transmitting pulses. Two light receiving elements are provided and these light receiving element are disposed for detecting an incident angle of light inputted from the source of light. The wireless input device also has an input unit body having an operational unit for calculating the position of the pen-type input device from the amounts of light detected by the two light receiving elements.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: November 24, 1992
    Assignee: Data Stream Corporation
    Inventor: Tetuji Aoyagi