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Patent for Sale:

Private Listing: Number 3773 Private  

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Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 181: Acoustics

Devices and corresponding methods for mechanically transmitting, for amplifying and for ascertaining the direction of sound and for mechanically muffling or filtering sound, and not elsewhere provided for.

Subclass 200: Machine type enclosure
Subclass 202: Electical type devices (e.g., transformers, motors, etc.)
Subclass 204: Internal-combustion engine
Subclass 208: Damping of flexural structure

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