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Sumner Simpson received US Patent No. 1,578,928 on March 30, 1926, filed June 4, 1921. It was assigned to Raybestos CO.
The patent's description opens (from the scanned text):
The invention relates generally to proc esses of producing clutch facings, with more particular reference to the various types of automobile clutches.
- Author
- Sumner Simpson
- Published by
- US Patent Office
- Series
- US Patent No. 1,578,928
- Date
- March 30, 1926
- Library no.
- ACL Doc 22046 · asbestosclaims.law/library/22046
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 358 KB
Where it was listed
- Asbestos, May 1926, in its patents department (the year's issues)
Cite this document
Sumner Simpson. “Clutch Facing, and Process of Making Same (US Patent 1,578,928, 1926).” March 30, 1926. US Patent No. 1,578,928. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22046. https://asbestosclaims.law/library/22046.
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