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Robert H. Anderson received US Patent No. 1,458,675 on June 12, 1923, filed July 6, 1921. It was assigned to Asbestos Shingle Slate & Sheat.
The patent's description opens (from the scanned text):
This invention relates tonapparatus for producing slabs, shingles, blocks, etc, of asbestos cement composition and particu-j larly to apparatus in whichv the asbestos. cement material is mixed together in a wet plastic mass and pressed out in slab form through a die.
- Author
- Robert H. Anderson
- Published by
- US Patent Office
- Series
- US Patent No. 1,458,675
- Date
- June 12, 1923
- Library no.
- ACL Doc 21702 · asbestosclaims.law/library/21702
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 256 KB
Where it was listed
- Asbestos, October 1923, in its patents department (the year's issues)
Cite this document
Robert H. Anderson. “Apparatus for forming Asbestos Cement Slabs (US Patent 1,458,675, 1923).” June 12, 1923. US Patent No. 1,458,675. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21702. https://asbestosclaims.law/library/21702.
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