Scannable form having a control mark column with encoded data marks
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United States of America Patent
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Feb 2, 1993
Issued Date -
N/A
app pub date -
Jan 24, 1992
filing date -
Dec 4, 1989
priority date (Note) -
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Abstract
A scannable form for use in an optical mark reading system has a timing track that is pre-encoded with data information known or determined prior to a respondent completing the scannable form. The data information is pre-encoded in the control mark column on the scannable form by utilizing that portion of the control mark column that is not essential for conveying the scan control information associated with the scan control marks. The data information is encoded using data marks that represent the data information in a binary or other similar coding technique. The data marks are column-aligned with the scan control marks in the control mark column.
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