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H. Hardinge received US Patent No. 2,899,139 on August 11, 1959.
The patent's description opens (from the scanned text):
The present invention relates to a method for concentrating and classifying material and also to an exemplary apparatus capable of performing the method in a desirable manner.
- Author
- H. Hardinge
- Published by
- US Patent Office
- Series
- US Patent No. 2,899,139
- Date
- August 11, 1959
- Library no.
- ACL Doc 23003 · asbestosclaims.law/library/23003
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 10 pages · 1.0 MB
Where it was listed
- Asbestos, November 1959, in its patents department (the year's issues)
Cite this document
H. Hardinge. “Method and apparatus for concentrating and classifying material (US Patent 2,899,139, 1959).” August 11, 1959. US Patent No. 2,899,139. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23003. https://asbestosclaims.law/library/23003.
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