Image forming apparatus which can prevent copying during a predetermined period and allow copying at other times
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 14, 1995
Grant Date -
N/A
app pub date -
Jun 28, 1994
filing date -
Jul 1, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A copy allowable time can be set for a document, and can be embedded in a hard copy of the document as discrete signals which cannot be recognized with the naked eye. A digital copying machine allows the document to be copied in a copy operation during the copy allowable time and, at other times, either prohibits copying or changes the copy operation.
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Family
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Cited Art Landscape
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