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Earl A. Wales received US Patent No. 2,175,418 on October 10, 1939, filed July 28, 1934.
The patent's description opens (from the scanned text):
This invention relates to improvements in friction disksused for disk clutches, disk brakes r the likegand refers specifically to a friction disk which is most durable, light with respect to its spinning weight and the overall coefiicient of friction of which'may be readily changed.
- Author
- Earl A. Wales
- Published by
- US Patent Office
- Series
- US Patent No. 2,175,418
- Date
- October 10, 1939
- Library no.
- ACL Doc 22375 · asbestosclaims.law/library/22375
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 425 KB
Where it was listed
- Asbestos, December 1939, in its patents department (the year's issues)
Cite this document
Earl A. Wales. “Friction Disk (US Patent 2,175,418, 1939).” October 10, 1939. US Patent No. 2,175,418. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22375. https://asbestosclaims.law/library/22375.
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