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O'Rahilly Aodhgan received US Patent No. 2,220,975 on November 12, 1940, filed February 3, 1939.
- Author
- O'Rahilly Aodhgan
- Published by
- US Patent Office
- Series
- US Patent No. 2,220,975
- Date
- November 12, 1940
- Library no.
- ACL Doc 22135 · asbestosclaims.law/library/22135
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, December 1940, in its patents department (the year's issues)
Cite this document
O'Rahilly Aodhgan. “Concrete Pipe Manufacturing Machine (US Patent 2,220,975, 1940).” November 12, 1940. US Patent No. 2,220,975. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22135. https://asbestosclaims.law/library/22135.
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