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Machine readable code combining preprinted indicia with hand-mark data

  • US 5,331,137 A
  • Filed: 07/14/1992
  • Issued: 07/19/1994
  • Est. Priority Date: 07/14/1992
  • Status: Expired due to Term
First Claim
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1. A method of entering a hand-marked response into a system using a plurality of encoded and pre-printed bar code sequences, each bar code sequence corresponding to a unique predetermined character string and including a plurality of spaces and a plurality of bars and a modified bar, the modified bar arranged to render the bar code sequence non-decodable by a bar code decoding device when the modified bar is not hand-marked, the modified bar arranged to render the bar code sequence decodable by the bar code decoding device when the modified bar is hand-marked, the method comprising;

  • a) hand-marking the modified bar of a selected one of the plurality of bar code sequences;

    b) reading the plurality of bar code sequences with a bar code reading means and forming a first signal representative of the plurality of bar code sequences;

    c) processing the first signal with the bar code decoding device to decode said unique predetermined character string corresponding to the selected one of the plurality of bar code sequences which includes the hand-marked modified bar, and forming a second signal including the decoded unique predetermined character string of the selected one of the plurality of bar code sequences; and

    d) outputting the second signal from the bar code decoding device to the system.

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