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Frank Lombardy received US Patent No. 3,437,546 on April 8, 1969, filed May 24, 1965. It was assigned to Johns Manville.
The patent's description opens:
This invention relates to an improved method in the manufacture of friction elements for use as clutch facings and the like, and in particular the invention comprises improvements in the formation of circular, convoluted or spiral-wound disc-type friction elements.
- Author
- Frank Lombardy
- Published by
- US Patent Office
- Series
- US Patent No. 3,437,546
- Date
- April 8, 1969
- Library no.
- ACL Doc 23697 · asbestosclaims.law/library/23697
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 463 KB
Where it was listed
- Asbestos, May 1969, in its patents department (the year's issues)
Cite this document
Frank Lombardy. “Spiral-wound disc friction element and method of making same (US Patent 3,437,546, 1969).” April 8, 1969. US Patent No. 3,437,546. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23697. https://asbestosclaims.law/library/23697.
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