Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
Class Information
Number: 434/313
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 > Manually
Description: Subject matter wherein the reproducing head is moved by hand.










Patents under this class:

Patent Number Title Of Patent Date Issued
4337375 Manually controllable data reading apparatus for speech synthesizers Jun. 29, 1982
4273538 Educational aid Jun. 16, 1981
4219703 Sound reproduction device for talking books Aug. 26, 1980
4044393 Hand guided tape player Aug. 23, 1977
3970803 Printed sound track system Jul. 20, 1976











 
 
  Recently Added Patents
Network based technique for obtaining operator identifier for mobile devices
Preparation and use of meristematic cells belonging to the Dendrobium phalaenopsis, Ansellia, Polyrrhiza, Vanilla, Cattleya and Vanda genera with high content of phenylpropanoids, hydrosoluble
Motion blur reduction for LCD video/graphics processors
Electronic device
Enabling improvement in cellular network coverage
Electronic device and printed circuit board
Method and apparatus for using virtual machine technology for managing parallel communicating applications
  Randomly Featured Patents
Device for linking door to case in drum type washing machine and method for assembling the same
Sterile adapter for use in blood transfers
Deicer compositions including corrosion inhibitors
Adaptive spatial microwave filter
Method for converting organic chloroformate to the corresponding organic chloride
Method and device for immunoassay
Al alloy film for display device, display device, and sputtering target
Adaptive signal latency control for communications systems signals
High-voltage through-type ceramic capacitor
Lamp with adjustable arm