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Frank A. Headson received US Patent No. 1,499,774 on July 1, 1924, filed August 26, 1922. It was assigned to Johns Manville Inc.
- Author
- Frank A. Headson
- Published by
- US Patent Office
- Series
- US Patent No. 1,499,774
- Date
- July 1, 1924
- Library no.
- ACL Doc 22599 · asbestosclaims.law/library/22599
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, September 1924, in its patents department (the year's issues)
Cite this document
Frank A. Headson. “Heat Insulating Coverings for Pipes, Process of making (US Patent 1,499,774, 1924).” July 1, 1924. US Patent No. 1,499,774. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22599. https://asbestosclaims.law/library/22599.
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