Masayasu Kitano

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Kashihara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of preventing loss of drilling mud during boring a hole in t...
- Patent number 4,770,257
- Issue date Sep 13, 1988
- Kabushiki Kaisha Takenaka Komuten
- Motoki Kondo
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and device for conveying chemicals through borehole
- Patent number 4,721,159
- Issue date Jan 26, 1988
- Takenaka Komuten Co., Ltd.
- Katsutoshi Ohkochi
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and device for conveying chemicals through borehole
- Patent number 4,706,753
- Issue date Nov 17, 1987
- Takanaka Komuten Co., Ltd
- Katsutoshi Ohkochi
- E21 - EARTH DRILLING MINING