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Hans Gerdien received US Patent No. 1,670,659 on May 22, 1928, filed November 7, 1925. It was assigned to Siemens Corp.
- Author
- Hans Gerdien
- Published by
- US Patent Office
- Series
- US Patent No. 1,670,659
- Date
- May 22, 1928
- Library no.
- ACL Doc 21746 · asbestosclaims.law/library/21746
- Rights
- US government work, in the public domain.
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Where it was listed
- Asbestos, June 1928, in its patents department (the year's issues)
Cite this document
Hans Gerdien. “Asbestos Bodies, Process of Making (US Patent 1,670,659, 1928).” May 22, 1928. US Patent No. 1,670,659. US Patent Office. AsbestosClaims.Law Library, ACL Doc 21746. https://asbestosclaims.law/library/21746.
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