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using brick- laying machines
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Industry
CPC
E21D11/07
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21D
SHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS
E21D11/00
Lining tunnels, galleries or other underground cavities
Current Industry
E21D11/07
using brick- laying machines
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus for lining kilns, tunnels and the like
Patent number
4,363,202
Issue date
Dec 14, 1982
Eugene B. Kenyon
F27 - FURNACES KILNS OVENS RETORTS
Information
Patent Grant
3417533
Patent number
3,417,533
Issue date
Dec 24, 1968
E04 - BUILDING
Information
Patent Grant
3075359
Patent number
3,075,359
Issue date
Jan 29, 1963
E21 - EARTH DRILLING MINING
Information
Patent Grant
2128172
Patent number
2,128,172
Issue date
Aug 23, 1938
E21 - EARTH DRILLING MINING
Information
Patent Grant
1917170
Patent number
1,917,170
Issue date
Jul 4, 1933
E21 - EARTH DRILLING MINING
Information
Patent Grant
1823757
Patent number
1,823,757
Issue date
Sep 15, 1931
E21 - EARTH DRILLING MINING
Information
Patent Grant
1516976
Patent number
1,516,976
Issue date
Nov 25, 1924
E21 - EARTH DRILLING MINING
Information
Patent Grant
1505060
Patent number
1,505,060
Issue date
Aug 12, 1924
E21 - EARTH DRILLING MINING
Information
Patent Grant
1478163
Patent number
1,478,163
Issue date
Dec 18, 1923
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents