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Donald S. Bruce received US Patent No. 2,253,608 on August 26, 1941, filed December 2, 1936. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
The invention relates to a friction element, The invention comprises the novel features of the product herein described,'lncluding a friction element containing a matrix of friction material with granules having a hardness of the order of that of brass embedded therein and in unrestricted contact therewith.
- Author
- Donald S. Bruce
- Published by
- US Patent Office
- Series
- US Patent No. 2,253,608
- Date
- August 26, 1941
- Library no.
- ACL Doc 22393 · asbestosclaims.law/library/22393
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 333 KB
Where it was listed
- Asbestos, September 1941, in its patents department (the year's issues)
Cite this document
Donald S. Bruce. “Friction Element (US Patent 2,253,608, 1941).” August 26, 1941. US Patent No. 2,253,608. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22393. https://asbestosclaims.law/library/22393.
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