This subclass is indented under subclass 439. Subject matter wherein the coded indicia on the record is
sensed by transmitting light through or reflecting light from the
record surface, the light detected being converted into an electrical signal
representative of the indicia.
(1)
Note. The subject matter in this subclass and those indented
hereunder differs from that found in Class 250 in that the light
detected is converted to an electrical signal which is further processed
by particular circuitry, the particular circuitry including the
generating and utilization of timing and sync signals, the storage
of signals, and means to perform counting operations.
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