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Daniel C. Drill received US Patent No. 1,956,377 on April 24, 1934, filed November 30, 1932. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to a material for general heat (and cold) insulating purposes, and for acoustical correction.
- Author
- Daniel C. Drill
- Published by
- US Patent Office
- Series
- US Patent No. 1,956,377
- Date
- April 24, 1934
- Library no.
- ACL Doc 22768 · asbestosclaims.law/library/22768
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, July 1934, in its patents department (the year's issues)
- Barry Castleman, Asbestos: Medical and Legal Aspects (5th edition, 2005)
Cited by Barry Castleman
In Asbestos: Medical and Legal Aspects (5th edition, 2005), which cites it in:
- Chapter 6 (Alternatives to Asbestos Insulation), p. 382, note 98
Cited on this site
Cite this document
Daniel C. Drill. “Insulating Material (US Patent 1,956,377, 1934).” April 24, 1934. US Patent No. 1,956,377. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22768. https://asbestosclaims.law/library/22768.
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