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Wilbur F. Fischer received US Patent No. 2,235,630 on March 18, 1941, filed July 23, 1936. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to a method and ma'- chine for winding sheet material into a tube and to the resulting tubular product.
- Author
- Wilbur F. Fischer
- Published by
- US Patent Office
- Series
- US Patent No. 2,235,630
- Date
- March 18, 1941
- Library no.
- ACL Doc 23795 · asbestosclaims.law/library/23795
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 251 KB
Where it was listed
- Asbestos, May 1941, in its patents department (the year's issues)
Cite this document
Wilbur F. Fischer. “Tubular Insulation (US Patent 2,235,630, 1941).” March 18, 1941. US Patent No. 2,235,630. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23795. https://asbestosclaims.law/library/23795.
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