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Norman P. Harshberger received US Patent No. 2,133,988 on October 25, 1938, filed July 23, 1935. It was assigned to Bakelite Building Prod CO Inc.
The patent's description opens (from the scanned text):
The invention is also admirably suited to the formation of a laminated structure, comprising alternate layers of adhesive coating material such as asphalt or the like and metal particles.
- Author
- Norman P. Harshberger
- Published by
- US Patent Office
- Series
- US Patent No. 2,133,988
- Date
- October 25, 1938
- Library no.
- ACL Doc 23595 · asbestosclaims.law/library/23595
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 527 KB
Where it was listed
- Asbestos, January 1939, in its patents department (the year's issues)
Cite this document
Norman P. Harshberger. “Roofing and Siding Elements (US Patent 2,133,988, 1938).” October 25, 1938. US Patent No. 2,133,988. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23595. https://asbestosclaims.law/library/23595.
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