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Sketching unit for transmission of sketches and notes over normal telephone lines

  • US 5,915,003 A
  • Filed: 02/20/1997
  • Issued: 06/22/1999
  • Est. Priority Date: 06/14/1993
  • Status: Expired due to Term
First Claim
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1. A sketching system for sketching first notes to be transmitted over a telephone line during a telephone call using the telephone line, the sketching system receiving second notes from another sketching system, the sketching system comprising:

  • a signal de-combiner device, receiving the second notes from the another sketching system and voice data as a combined signal via the telephone line and de-combining the combined signal into the second notes and the voice data;

    a sketching unit connected to said signal de-combiner and includinga note displaying device displaying the first and second notes;

    a note generating device generating the first notes;

    a processor connected to said note displaying and generating devices and to said signal de-combiner, receiving the first notes from said note generating device, receiving the second notes from said de-combiner device, and transmitting the first and second notes to said note displaying device,clearing means for selectively clearing one of said note displaying device and another note displaying device of said another sketching system, the clearing means being selectively operable to;

    (1) clear said note displaying device and not clear said other note displaying device, (2) clear said other note displaying device and not clear said note displaying device, and (3) clear both said note displaying device and said other note displaying device;

    erase means for selectively erasing the first and second notes displayed on one of said note displaying device and said another note displaying device the erase means being selectively operable to;

    (1) erase the first and second notes displayed on said note displaying device but not on the noted displaying device of said other sketching system, (2) erase the first and second notes displayed on the note displaying device of said other sketching system but not on said note displaying device; and

    (3) erase the first and second notes displayed on both the note displaying device and on the note displaying device of said other sketching system;

    first lock means for selectively preventing said processor from transmitting the first notes of the note generating device and, preventing the first notes from being displayed on said another sketching system; and

    second lock means for selectively preventing said processor from transmitting the second notes to said note displaying devices;

    wherein the sketching system operates in a full duplex mode such that said first notes and said second notes can be simultaneously created and edited on said display.

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