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
Projector
Lubricant supplying device, process cartridge, and image forming apparatus
Video reproducing apparatus and video reproducing method
Organic elelectroluminescent display
Method and apparatus for transmitting and receiving a signal in a communication system
Integrated touch screen
In-vehicle communication system and method of operation
  Randomly Featured Patents
Refrigerant alternative to chlorinated freon and method of manufacturing thereof
Dermabrasion devices and systems
Curtain airbag for a motor vehicle and bracket for fastening a curtain airbag to a motor vehicle
Finial ball
Presentation pocket
Intermetallic compound-based, composite superconductor
Dynamic memory heap tagging
Clamp assembly
Method of controlling plant feeding mites with the fungus Neozygites floridana
Phase-coherent frequency synthesis with a DDS circuit