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Edward R. Powell received US Patent No. 2,003,309 on June 4, 1935, filed December 13, 1932. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to a lightweight article, particularly an acoustical and thermal insulating unit, and to the method of making the same.
- Author
- Edward R. Powell
- Published by
- US Patent Office
- Series
- US Patent No. 2,003,309
- Date
- June 4, 1935
- Library no.
- ACL Doc 22860 · asbestosclaims.law/library/22860
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 658 KB
Where it was listed
- Asbestos, July 1935, in its patents department (the year's issues)
Cite this document
Edward R. Powell. “Light Weight Article (US Patent 2,003,309, 1935).” June 4, 1935. US Patent No. 2,003,309. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22860. https://asbestosclaims.law/library/22860.
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