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Ralph T. Halstead received US Patent No. 2,267,913 on December 30, 1941, filed May 11, 1938. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
The invention is illustrated by the following specific examples.
- Author
- Ralph T. Halstead
- Published by
- US Patent Office
- Series
- US Patent No. 2,267,913
- Date
- December 30, 1941
- Library no.
- ACL Doc 22276 · asbestosclaims.law/library/22276
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, March 1942, in its patents department (the year's issues)
Cited on this site
Cite this document
Ralph T. Halstead. “Fibrous Article of Manufacture (US Patent 2,267,913, 1941).” December 30, 1941. US Patent No. 2,267,913. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22276. https://asbestosclaims.law/library/22276.
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