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Donald S. Bruce, Ralph T. Halstead and Edward B. Douglas received US Patent No. 2,309,571 on January 26, 1943, filed December 7, 1940.
The patent's description opens (from the scanned text):
This invention relates to friction materials and the method of manufacturing the same.
- Author
- Donald S. Bruce; Ralph T. Halstead; Edward B. Douglas
- Published by
- US Patent Office
- Series
- US Patent No. 2,309,571
- Date
- January 26, 1943
- Library no.
- ACL Doc 22449 · asbestosclaims.law/library/22449
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 6 pages · 540 KB
Where it was listed
- Asbestos, February 1943, in its patents department (the year's issues)
Cite this document
Donald S. Bruce, Ralph T. Halstead, Edward B. Douglas. “Friction Material Sheetings (US Patent 2,309,571, 1943).” January 26, 1943. US Patent No. 2,309,571. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22449. https://asbestosclaims.law/library/22449.
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