Toshiyuki Ohshita

Follow

Person

Hirakata, JP

People

Patents Grantslast 30 patents

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