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John W. Ryznar received US Patent No. 2,971,615 on February 14, 1961, filed February 17, 1956. It was assigned to Nalco Chemical Co.
The patent's description opens:
This invention relates to a new and improved brake element of the hard solid type for use in engagement with a complementary brake element.
- Author
- John W. Ryznar
- Published by
- US Patent Office
- Series
- US Patent No. 2,971,615
- Date
- February 14, 1961
- Library no.
- ACL Doc 21954 · asbestosclaims.law/library/21954
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 266 KB
Where it was listed
- Asbestos, June 1961, in its patents department (the year's issues)
Cite this document
John W. Ryznar. “Brake element (US Patent 2,971,615, 1961).” February 14, 1961. US Patent No. 2,971,615. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21954. https://asbestosclaims.law/library/21954.
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