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Class Information
Number: 381/
Name: Electrical audio signal processing systems and devices > Binaural and stereophonic
Description:










Sub-classes under this class:

Class Number Class Name Patents
381/28 Amplifier 141
381/2 Broadcast or multiplex stereo 308
381/27 Center channel 156
381/23.1 Hearing aid 145
381/17 Pseudo stereophonic 792
381/19 Quadrasonic 202
381/26 Stereo sound pickup device (microphone) 161
381/300 Stereo speaker arrangement 299


Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
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