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Donald D. Grassick received US Patent No. 2,312,987 on March 2, 1943, filed November 15, 1939.
- Author
- Donald D. Grassick
- Published by
- US Patent Office
- Series
- US Patent No. 2,312,987
- Date
- March 2, 1943
- Library no.
- ACL Doc 22596 · asbestosclaims.law/library/22596
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, April 1943, in its patents department (the year's issues)
Cite this document
Donald D. Grassick. “Heat Insulating Composition (US Patent 2,312,987, 1943).” March 2, 1943. US Patent No. 2,312,987. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22596. https://asbestosclaims.law/library/22596.
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