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Russell H. Heilman received US Patent No. 1,931,795 on October 24, 1933, filed April 23, 1929.
- Author
- Russell H. Heilman
- Published by
- US Patent Office
- Series
- US Patent No. 1,931,795
- Date
- October 24, 1933
- Library no.
- ACL Doc 22764 · asbestosclaims.law/library/22764
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, January 1934, in its patents department (the year's issues)
Cite this document
Russell H. Heilman. “Insulating Material (US Patent 1,931,795, 1933).” October 24, 1933. US Patent No. 1,931,795. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22764. https://asbestosclaims.law/library/22764.
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