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
System and method for efficient association of a power outlet and device
Clusterin antisense therapy for treatment of cancer
Author signatures for legal purposes
Calibration of quadrature imbalances using wideband signals
Creating three dimensional graphics data
Eyeglasses
Cascode circuit device with improved reverse recovery characteristic
  Randomly Featured Patents
Use of volume bragg gratings for the conditioning of laser emission characteristics
Method of diluting hydrogen gas exhausted from a fuel cell
Light detection device, imaging device and distant image acquisition device
I/Q demodulation circuit
System and method for adjusting color reproduction
Wire suspension arm
Print head apparatus
Structure of an LED decoration lamp
Method and apparatus for handling bar-shaped material
System for magnetic resonance and X-Ray imaging