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Charles J. Beckwith received US Patent No. 2,029,352 on February 4, 1936, filed April 15, 1932. It was assigned to Johns Manville.
- Author
- Charles J. Beckwith
- Published by
- US Patent Office
- Series
- US Patent No. 2,029,352
- Date
- February 4, 1936
- Library no.
- ACL Doc 23525 · asbestosclaims.law/library/23525
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, April 1936, in its patents department (the year's issues)
Cite this document
Charles J. Beckwith. “Re-enforced Insulating Roofing Slab (US Patent 2,029,352, 1936).” February 4, 1936. US Patent No. 2,029,352. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23525. https://asbestosclaims.law/library/23525.
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