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Alfred Hugh Gallagher received US Patent No. 1,535,220 on April 28, 1925, filed September 22, 1924.
The patent's description opens (from the scanned text):
The present invention is intended to 'pro- 50 wide a heat insulating structure in which the loose heat insulating material employed between the usual double walls is firmly held in place and prevented from settling by means which do not transmit the heat with rapidityand which are cheap to manufacture and easy toinstall.
- Author
- Alfred Hugh Gallagher
- Published by
- US Patent Office
- Series
- US Patent No. 1,535,220
- Date
- April 28, 1925
- Library no.
- ACL Doc 22640 · asbestosclaims.law/library/22640
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 449 KB
Where it was listed
- Asbestos, June 1925, in its patents department (the year's issues)
Cite this document
Alfred Hugh Gallagher. “Heat Insulation (US Patent 1,535,220, 1925).” April 28, 1925. US Patent No. 1,535,220. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22640. https://asbestosclaims.law/library/22640.
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