| http://www.w3.org/ns/prov#value | - The combination defined in claim 5 in which (A) said medium is a strip chart, (B) said recorder forms a graph on said chart, and (C) said scanner includes (1) means for sweeping a beam of light across said medium at said positions, (2) means for detecting the change in the manner in which said strip chart operates on said beam when said beam crosses said graph, and (3) means responsive to said det
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