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Patents Grantslast 30 patents

Information Patent Grant
Tunneling device for pipe jacking and its construction method
- Patent number 11,242,748
- Issue date Feb 8, 2022
- Yubin Wang
- E21 - EARTH DRILLING MINING
Information Patent Grant
3283831
- Patent number 3,283,831
- Issue date Nov 8, 1966
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
3244240
- Patent number 3,244,240
- Issue date Apr 5, 1966
- E21 - EARTH DRILLING MINING
Information Patent Grant
2614807
- Patent number 2,614,807
- Issue date Oct 21, 1952
- E21 - EARTH DRILLING MINING
Information Patent Grant
2396365
- Patent number 2,396,365
- Issue date Mar 12, 1946
- E21 - EARTH DRILLING MINING
Information Patent Grant
2069830
- Patent number 2,069,830
- Issue date Feb 9, 1937
- E21 - EARTH DRILLING MINING
Information Patent Grant
2053665
- Patent number 2,053,665
- Issue date Sep 8, 1936
- E21 - EARTH DRILLING MINING
Information Patent Grant
2026627
- Patent number 2,026,627
- Issue date Jan 7, 1936
- E21 - EARTH DRILLING MINING
Information Patent Grant
1992129
- Patent number 1,992,129
- Issue date Feb 19, 1935
- E21 - EARTH DRILLING MINING