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Donald S. Bruce received US Patent No. 2,136,585 on November 15, 1938, filed August 14, 1937. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
The present invention relates to improvements in friction materials such as brake blocks.
- Author
- Donald S. Bruce
- Published by
- US Patent Office
- Series
- US Patent No. 2,136,585
- Date
- November 15, 1938
- Library no.
- ACL Doc 22084 · asbestosclaims.law/library/22084
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 262 KB
Where it was listed
- Asbestos, February 1939, in its patents department (the year's issues)
Cite this document
Donald S. Bruce. “Composite Brake Block (US Patent 2,136,585, 1938).” November 15, 1938. US Patent No. 2,136,585. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22084. https://asbestosclaims.law/library/22084.
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