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Conral C. Callis received US Patent No. 2,396,246 on March 12, 1946, filed February 16, 1943. It was assigned to Armstrong Cork Co.
The patent's description opens (from the scanned text):
This invention relates to heat-insulating block of improved characteristics.
- Author
- Conral C. Callis
- Published by
- US Patent Office
- Series
- US Patent No. 2,396,246
- Date
- March 12, 1946
- Library no.
- ACL Doc 22650 · asbestosclaims.law/library/22650
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 533 KB
Where it was listed
- Asbestos, May 1946, in its patents department (the year's issues)
Cite this document
Conral C. Callis. “Heat Insulation Block (US Patent 2,396,246, 1946).” March 12, 1946. US Patent No. 2,396,246. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22650. https://asbestosclaims.law/library/22650.
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