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Raymond V. Parsons received US Patent No. 2,132,642 on October 11, 1938, filed July 21, 1932. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to a-sound dissipating forated in a manner adapted to admit incident and sound absorbing unit and particularly to one sound, as at positions 3 and 4.
- Author
- Raymond V. Parsons
- Published by
- US Patent Office
- Series
- US Patent No. 2,132,642
- Date
- October 11, 1938
- Library no.
- ACL Doc 23686 · asbestosclaims.law/library/23686
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 423 KB
Where it was listed
- Asbestos, December 1938, in its patents department (the year's issues)
Cite this document
Raymond V. Parsons. “Sound Absorbing Unit (US Patent 2,132,642, 1938).” October 11, 1938. US Patent No. 2,132,642. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23686. https://asbestosclaims.law/library/23686.
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