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John Ferla received US Patent No. 2,156,382 on May 2, 1939, filed February 17, 1937.
The patent's description opens (from the scanned text):
The invention relates to a method of and means for treating composition material and particularly concerns a method of drying, painting, and redrying composition material.
- Author
- John Ferla
- Published by
- US Patent Office
- Series
- US Patent No. 2,156,382
- Date
- May 2, 1939
- Library no.
- ACL Doc 23089 · asbestosclaims.law/library/23089
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 282 KB
Where it was listed
- Asbestos, July 1939, in its patents department (the year's issues)
Cite this document
John Ferla. “Method of Treating Composition Boards (US Patent 2,156,382, 1939).” May 2, 1939. US Patent No. 2,156,382. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23089. https://asbestosclaims.law/library/23089.
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