Marking device for electronic presentation board

CAFC
  • US 6,326,565 B1
  • Filed: 02/28/1997
  • Issued: 12/04/2001
  • Est. Priority Date: 02/28/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A transmitter device for use with a system for digitizing operative strokes of a handheld drawing implement, the drawing implement having a body and an operative tip, the transmitter device comprising:

  • a housing;

    a transmitter mounted relative to said housing;

    a microswitch that is responsive to a force exerted on the operative tip of the drawing implement towards said housing;

    electronic circuitry responsive to said microswitch to affect operation of said transmitter, wherein said electronic circuitry operates said transmitter for a given time interval after said microswitch ceases to indicate a force exerted on said housing towards the operative tip of the drawing implement.

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