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Ralph Jacobs received US Patent No. 2,237,258 on April 1, 1941, filed May 11, 1937.
The patent's description opens (from the scanned text):
This invention relates to an article of manufacture and the method of making the same and, particularly, to an asbestos and cement sheet having a precipitate formed in the face portion thereof. of appearance.
- Author
- Ralph Jacobs
- Published by
- US Patent Office
- Series
- US Patent No. 2,237,258
- Date
- April 1, 1941
- Library no.
- ACL Doc 23635 · asbestosclaims.law/library/23635
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 280 KB
Where it was listed
- Asbestos, May 1941, in its patents department (the year's issues)
Cited on this site
Cite this document
Ralph Jacobs. “Shingle (Article of manufacture and method of making) (US Patent 2,237,258, 1941).” April 1, 1941. US Patent No. 2,237,258. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23635. https://asbestosclaims.law/library/23635.
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