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Frank J. Koehne received US Patent No. 2,474,314 on June 28, 1949, filed November 28, 1944.
The patent's description opens (from the scanned text):
This invention relates to improvements in method and equipment for dry crushing and fiberizing coarse, fibrous materials, and is particularly concerned with improvements in method and apparatus whereby crude fibrous materials such as asbestos may be efiiciently crushed, opened and cleaned.
- Author
- Frank J. Koehne
- Published by
- US Patent Office
- Series
- US Patent No. 2,474,314
- Date
- June 28, 1949
- Library no.
- ACL Doc 23671 · asbestosclaims.law/library/23671
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 7 pages · 758 KB
Where it was listed
- Asbestos, July 1949, in its patents department (the year's issues)
Cite this document
Frank J. Koehne. “Size Reduction and Fiberizing of Crude Fibrous Materials (US Patent 2,474,314, 1949).” June 28, 1949. US Patent No. 2,474,314. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23671. https://asbestosclaims.law/library/23671.
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