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Norman P. Harshberger received US Patent No. 3,137,100 on June 16, 1964, filed April 29, 1953.
- Author
- Norman P. Harshberger
- Published by
- US Patent Office
- Series
- US Patent No. 3,137,100
- Date
- June 16, 1964
- Library no.
- ACL Doc 23597 · asbestosclaims.law/library/23597
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, January 1965, in its patents department (the year's issues)
Cite this document
Norman P. Harshberger. “Roofing product (US Patent 3,137,100, 1964).” June 16, 1964. US Patent No. 3,137,100. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23597. https://asbestosclaims.law/library/23597.
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