Resources
Contact Us
Home
Browse by:
INVENTOR
PATENT HOLDER
PATENT NUMBER
DATE
Browse by Category:
Main
>
Business
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
Recently Added Patents
Method and apparatus for circuit design closure using partitions
System and method for security processing media streams
Heddle shaft with novel corner connector
Method of making a thermally isolated via structure
Systems and methods for de-blurring motion blurred images
Heterostructure including light generating structure contained in potential well
Controller for internal combustion engine
Randomly Featured Patents
Phase-locked loop filter capacitance with a drag current
Pressure relief filter and valve and cryopump utilizing the same
Desktop podium
Mowing apparatus
Injection laser modulator with external resonator
Slide-together airbag module
Information distribution system and method
Method and device for encoding video signal
Alkaline strip passivation
Automotive engine signal digitization
© 2006. PatentGenius. All Rights Reserved.
