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Class Information
Number: 181/162
Name: Acoustics > Diaphragm > With direct mechanical connection to drive unit > Stylus bar
Description: Subject matter wherein the driver unit is a needle or holder furnished with an abrasive-resistant tip.

Patents under this class:

Patent Number Title Of Patent Date Issued
7918309 Apparatus for producing a continuous sonic boom Apr. 5, 2011
5081387 Pump motor/basket brake for an automatic washer Jan. 14, 1992

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