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Herman B. Heyn and Frank G. Boschke received US Patent No. 2,238,169 on April 15, 1941, filed October 1, 1938. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
The present invention relates to improvements in pipe connections, such as employed between service pipes and mains, tanks, and similar pressure chambers.
- Author
- Herman B. Heyn; Frank G. Boschke
- Published by
- US Patent Office
- Series
- US Patent No. 2,238,169
- Date
- April 15, 1941
- Library no.
- ACL Doc 23316 · asbestosclaims.law/library/23316
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 398 KB
Where it was listed
- Asbestos, May 1941, in its patents department (the year's issues)
Cite this document
Herman B. Heyn, Frank G. Boschke. “Pipe Connection (US Patent 2,238,169, 1941).” April 15, 1941. US Patent No. 2,238,169. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23316. https://asbestosclaims.law/library/23316.
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