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William F. Astley received US Patent No. 2,193,546 on March 12, 1940, filed December 3, 1938. It was assigned to Union Asbestos and Rubber Co.
- Author
- William F. Astley
- Published by
- US Patent Office
- Series
- US Patent No. 2,193,546
- Date
- March 12, 1940
- Library no.
- ACL Doc 22622 · asbestosclaims.law/library/22622
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, May 1940, in its patents department (the year's issues)
Cite this document
William F. Astley. “Heat Insulating Materials (US Patent 2,193,546, 1940).” March 12, 1940. US Patent No. 2,193,546. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22622. https://asbestosclaims.law/library/22622.
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