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Class Information
Number: 434/313
Name: Education and demonstration > Audio recording and visual means > Common carrier for visual means and audio recording > Card, sheet, or block > Reading head moved past stationary audio track > Manually
Description: Subject matter wherein the reproducing head is moved by hand.

Patents under this class:

Patent Number Title Of Patent Date Issued
4337375 Manually controllable data reading apparatus for speech synthesizers Jun. 29, 1982
4273538 Educational aid Jun. 16, 1981
4219703 Sound reproduction device for talking books Aug. 26, 1980
4044393 Hand guided tape player Aug. 23, 1977
3970803 Printed sound track system Jul. 20, 1976

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