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
Inductive antenna coupling
Bicycle carrier
System and method for detecting deadlock in a multithread program
Meter socket cabinet
Method and apparatus for sharing virtual workspaces
Method to dynamically tune precision resistance
Wireless updating of hearing devices
  Randomly Featured Patents
Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system
Four parallel shaft type automatic transmission
Foundation wall outer moisture bar sheet or basement inner wall or floor humidity controlling lining sheet or the like
Tabbed shingles length cut at mid-tab
Flashlight
Log cinch
Ball and socket bearing for artificial joint
Hybrid tea rose plant cv. Arobipy
Method of making spray-formed articles using a polymeric mandrel
Toolholder assembly