Resources Contact Us Home
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 for thermally controlling displays
Label with surface ornamentation
Package for a medicinal product
Scalable header extension
Channel marking for chip mark overflow and calibration errors
MiR 204, miR 211, their anti-miRs, and therapeutic uses of same
Process for making thermoplastic polymer pellets
  Randomly Featured Patents
Mechanism for receiving messages at a coupling facility
Semiconductor integrated circuit and semiconductor input system
Rotary dobby
Vertical blanking interval encoding of internet addresses for integrated television/internet devices
Polyalkene having improved dyeability modified with polyamide
Antenna assembly with a moveable antenna
Method for controlling the temperature of an injection-molding machine and mold tool units
Tetrafluoroethylene copolymers
Compounds and their use related to compositions for treating disease
Gaming device having an award offer and termination bonus scheme