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Christenson George received US Patent No. 2,220,993 on November 12, 1940, filed July 21, 1937. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention is capable of being applied to many different types of machines or apparatuses which involve a piston and cylinder assembly, and is not limited to any specific application.
- Author
- Christenson George
- Published by
- US Patent Office
- Series
- US Patent No. 2,220,993
- Date
- November 12, 1940
- Library no.
- ACL Doc 23358 · asbestosclaims.law/library/23358
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 334 KB
Where it was listed
- Asbestos, December 1940, in its patents department (the year's issues)
Cite this document
Christenson George. “Piston Packing (US Patent 2,220,993, 1940).” November 12, 1940. US Patent No. 2,220,993. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23358. https://asbestosclaims.law/library/23358.
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