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John Ferla received US Patent No. 2,200,267 on May 14, 1940, filed June 6, 1938.
- Author
- John Ferla
- Published by
- US Patent Office
- Series
- US Patent No. 2,200,267
- Date
- May 14, 1940
- Library no.
- ACL Doc 23355 · asbestosclaims.law/library/23355
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, July 1940, in its patents department (the year's issues)
Cite this document
John Ferla. “Pipes of Cementitious Material (US Patent 2,200,267, 1940).” May 14, 1940. US Patent No. 2,200,267. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23355. https://asbestosclaims.law/library/23355.
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