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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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