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Thore Martin Elfving received US Patent No. 2,406,815 on September 3, 1946, filed July 9, 1943.
The patent's description opens (from the scanned text):
The present invention relates to heat insulations in the form of boards composed of foils separated by air intermediate spaces.
- Author
- Thore Martin Elfving
- Published by
- US Patent Office
- Series
- US Patent No. 2,406,815
- Date
- September 3, 1946
- Library no.
- ACL Doc 23226 · asbestosclaims.law/library/23226
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 534 KB
Where it was listed
- Asbestos, October 1946, in its patents department (the year's issues)
Cite this document
Thore Martin Elfving. “Multilayer Insulation (US Patent 2,406,815, 1946).” September 3, 1946. US Patent No. 2,406,815. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23226. https://asbestosclaims.law/library/23226.
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