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Joseph Berg received US Patent No. 1,780,739 on November 4, 1930, filed April 12, 1930.
The patent's description opens (from the scanned text):
This invention relates to an insulating block to be used for walls of refrlgerating units, buildings where temperature preserv- I ing qualities are paramount, or other similar Another object is to so dispose the cells in the block that in case of puncture, only a limited number of cells will be subjected to atmospheric pressure, while the remaining cells comprising the major portion of the block will still be under a partial vacuum, thus maintaining its desired insulating characteristics.
- Author
- Joseph Berg
- Published by
- US Patent Office
- Series
- US Patent No. 1,780,739
- Date
- November 4, 1930
- Library no.
- ACL Doc 22740 · asbestosclaims.law/library/22740
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 253 KB
Where it was listed
- Asbestos, January 1931, in its patents department (the year's issues)
Cite this document
Joseph Berg. “Insulating Block (US Patent 1,780,739, 1930).” November 4, 1930. US Patent No. 1,780,739. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22740. https://asbestosclaims.law/library/22740.
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