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Class Information
Number: 181/181
Name: Acoustics > Sound-modifying means > Intensifying horn > With vibratory filaments
Description: Subject matter including thin wires which are attached to the sound intensifying horn.










Patents under this class:

Patent Number Title Of Patent Date Issued
8379904 Electroacoustic vibrating transducer Feb. 19, 2013
5302310 Detergent compositions containing a carbonate builder, a seed crystal and an immobilized sequestrant Apr. 12, 1994
5170436 Acoustic speaker system Dec. 8, 1992











 
 
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