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Class Information
Number:
434/312
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
Description:
Subject matter wherein the sound information is reproduced by moving a reproducing head past an audio track on a stationary card, sheet, or block.
Sub-classes under this class:
Class Number
Class Name
Patents
434/313
Manually
5
Patents under this class:
Patent Number
Title Of Patent
Date Issued
6482564
Electronically active primer layers for thermal patterning of materials for electronic devices
Nov. 19, 2002
4460342
Aid for speech therapy and a method of making same
Jul. 17, 1984
4273538
Educational aid
Jun. 16, 1981
4245404
Audio-visual teaching machine
Jan. 20, 1981
4027405
Record-reproduce device for flash cards
Jun. 7, 1977
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