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William Nanfeldt received US Patent No. 1,980,221 on November 13, 1934, filed July 9, 1931. It was assigned to World Bestos Corp.
- Author
- William Nanfeldt
- Published by
- US Patent Office
- Series
- US Patent No. 1,980,221
- Date
- November 13, 1934
- Library no.
- ACL Doc 21923 · asbestosclaims.law/library/21923
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, January 1935, in its patents department (the year's issues)
Cite this document
William Nanfeldt. “Brake Lining Compound (US Patent 1,980,221, 1934).” November 13, 1934. US Patent No. 1,980,221. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21923. https://asbestosclaims.law/library/21923.
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