Toyohiko Youan

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Reamer apparatus for ground boring machine
- Patent number 7,128,168
- Issue date Oct 31, 2006
- Komatsu Ltd.
- Toyohiko Youan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ground drilling machine
- Patent number 6,932,171
- Issue date Aug 23, 2005
- Komatsu Ltd.
- Toyohiko Youan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Leading body for ground drilling and ground drilling machine
- Patent number 6,913,094
- Issue date Jul 5, 2005
- Komatsu Ltd.
- Toyohiko Youan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ground drilling machine and rod exchanger utilized therefor
- Patent number 6,637,525
- Issue date Oct 28, 2003
- Komatsu Ltd.
- Kentaro Watanabe
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Leading body for ground drilling and ground drilling machine
- Publication number 20030226692
- Publication date Dec 11, 2003
- Komatsu Ltd.
- Toyohiko Youan
- E21 - EARTH DRILLING MINING
Information Patent Application
Ground drilling machine
- Publication number 20030226691
- Publication date Dec 11, 2003
- Komatsu Ltd.
- Toyohiko Youan
- E21 - EARTH DRILLING MINING
Information Patent Application
Ground drilling machine and rod exchanger utilized therefor
- Publication number 20020062994
- Publication date May 30, 2002
- Kentaro Watanabe
- E21 - EARTH DRILLING MINING