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Walter L. Steffens and Laurence E. Whitaker received US Patent No. 2,371,556 on March 13, 1945, filed June 13, 1942. It was assigned to Philip Carey Manufacturing Co.
- Author
- Walter L. Steffens; Laurence E. Whitaker
- Published by
- US Patent Office
- Series
- US Patent No. 2,371,556
- Date
- March 13, 1945
- Library no.
- ACL Doc 22070 · asbestosclaims.law/library/22070
- Rights
- US government work, in the public domain.
Read or download
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Where it was listed
- Asbestos, May 1945, in its patents department (the year's issues)
Cite this document
Walter L. Steffens, Laurence E. Whitaker. “Collapsible Air Conduit (US Patent 2,371,556, 1945).” March 13, 1945. US Patent No. 2,371,556. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22070. https://asbestosclaims.law/library/22070.
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