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Edward A. Toohey and Earle R. Williams received US Patent No. 1,972,500 on September 4, 1934.
The patent's description opens (from the scanned text):
This invention relates to insulating material and more particularly to thermal insulating material of minimized vapor breathing properties as indicated by minimized change in volume or length of a unit of the material with variation in the relative humidity of air in contact therewith.
- Author
- Edward A. Toohey; Earle R. Williams
- Published by
- US Patent Office
- Series
- US Patent No. 1,972,500
- Date
- September 4, 1934
- Library no.
- ACL Doc 22826 · asbestosclaims.law/library/22826
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 459 KB
Where it was listed
- Asbestos, October 1934, in its patents department (the year's issues)
Cite this document
Edward A. Toohey, Earle R. Williams. “Insulation Material (US Patent 1,972,500, 1934).” September 4, 1934. US Patent No. 1,972,500. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22826. https://asbestosclaims.law/library/22826.
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