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Class Information
Number: 181/207
Name: Acoustics > Sound-modifying means > Mechanical vibration attenuator
Description: Subject matter comprising sound deadening material physically or mechanically attached or installed on the acoustical device, or an element thereof to prevent vibratory noise usual to the operation of the device.

Sub-classes under this class:

Class Number Class Name Patents
181/208 Damping of flexural structure 161
181/209 Relatively moving parts 61

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
3982600 Vehicle engine hood Sep. 28, 1976
3971447 Drill rod for percussion drilling Jul. 27, 1976
3957132 Snowmobile muffler May. 18, 1976
3937590 Acoustic duct with peripherally segmented acoustic treatment Feb. 10, 1976

1 2 3 4 5 6

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