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2599042
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Information
Patent Grant
2599042
References
Source
Patent Number
2,599,042
Date Filed
Not available
Date Issued
Tuesday, June 3, 1952
72 years ago
CPC
E21D9/00 - Tunnels or galleries, with or without linings Methods or apparatus for making thereof Layout of tunnels or galleries
E21C25/60 - Slitting by jets of water or other liquid
E21D9/01 - Methods or apparatus for enlarging or restoring the cross-section of tunnels
US Classifications
299 - Mining or in situ disintegration of hard material
173 - Tool driving or impacting
175 - Boring or penetrating the earth
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