11 Utility Patents
#253 in Charlotte, NC
#3,795 in North Carolina
#179,198 in US
#362,746 in the World
Forward Citations = 119
Company Filing History:
The Carborundum Company

Performance Friction Corporation
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#253 in Charlotte, NC
#3,795 in North Carolina
#179,198 in US
#362,746 in the World
Company Filing History:

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