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Henry R. Wardell received US Patent No. 1,642,316 on September 13, 1927, filed July 5, 1923.
The patent's description opens (from the scanned text):
My invention relates to roofs in general but is particularly designed to produce a structure which shall not only be waterproof, , but shall also be impervious to fumes,'vapors or gases which might disintegrate the waterproofing elements of the roof structure if allowed free access to them.
- Author
- Henry R. Wardell
- Published by
- US Patent Office
- Series
- US Patent No. 1,642,316
- Date
- September 13, 1927
- Library no.
- ACL Doc 23576 · asbestosclaims.law/library/23576
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 179 KB
Where it was listed
- Asbestos, December 1927, in its patents department (the year's issues)
Cite this document
Henry R. Wardell. “Roofing (US Patent 1,642,316, 1927).” September 13, 1927. US Patent No. 1,642,316. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23576. https://asbestosclaims.law/library/23576.
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