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William A. Barrell received US Patent No. 2,172,430 on September 12, 1939, filed October 14, 1937. It was assigned to Lawrence Duck Co.
- Author
- William A. Barrell
- Published by
- US Patent Office
- Series
- US Patent No. 2,172,430
- Date
- September 12, 1939
- Library no.
- ACL Doc 23670 · asbestosclaims.law/library/23670
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, November 1939, in its patents department (the year's issues)
Cite this document
William A. Barrell. “Single Ply Drier Felt with Asbestos Facing (US Patent 2,172,430, 1939).” September 12, 1939. US Patent No. 2,172,430. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23670. https://asbestosclaims.law/library/23670.
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