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William R. Seigle received US Patent No. 2,170,434 on August 22, 1939, filed October 12, 1935. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to an article of manuwaterepellent facture and the method of making the same. .It is an object of the present invention to provide a strong panel of satisfactory electrical re- 5 sistivity on exposure to the highest temperatures experienced during use as an electric switchboard panel or the like.
- Author
- William R. Seigle
- Published by
- US Patent Office
- Series
- US Patent No. 2,170,434
- Date
- August 22, 1939
- Library no.
- ACL Doc 21737 · asbestosclaims.law/library/21737
- 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)
Cited on this site
Cite this document
William R. Seigle. “Article of Manufacture (Electrical Switchboard Panel) (US Patent 2,170,434, 1939).” August 22, 1939. US Patent No. 2,170,434. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21737. https://asbestosclaims.law/library/21737.
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