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James L. Kempthorne received US Patent No. 2,481,021 on September 6, 1949, filed April 10, 1946.
The patent's description opens (from the scanned text):
My invention relates to a rolling device for leveling and texturing a layer of acoustical or insulating material.
- Author
- James L. Kempthorne
- Published by
- US Patent Office
- Series
- US Patent No. 2,481,021
- Date
- September 6, 1949
- Library no.
- ACL Doc 23570 · asbestosclaims.law/library/23570
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 318 KB
Where it was listed
- Asbestos, October 1949, in its patents department (the year's issues)
Cite this document
James L. Kempthorne. “Rolling Device (US Patent 2,481,021, 1949).” September 6, 1949. US Patent No. 2,481,021. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23570. https://asbestosclaims.law/library/23570.
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