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Vault Aylett F. De received US Patent No. 2,307,733 on January 12, 1943, filed April 30, 1941. It was assigned to Tilo Roofing Co Inc.
The patent's description opens (from the scanned text):
This invention relates to the art of making earthen or cement shingles and the like, and has for an object the provision of improvements in this art.
- Author
- Vault Aylett F. De
- Published by
- US Patent Office
- Series
- US Patent No. 2,307,733
- Date
- January 12, 1943
- Library no.
- ACL Doc 22942 · asbestosclaims.law/library/22942
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 490 KB
Where it was listed
- Asbestos, February 1943, in its patents department (the year's issues)
Cite this document
Vault Aylett F. De. “Making Asbestos Cement Shingles (US Patent 2,307,733, 1943).” January 12, 1943. US Patent No. 2,307,733. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22942. https://asbestosclaims.law/library/22942.
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