Inventor · disambiguated record
Toyohiko Youan
Also filed as: YOUAN TOYOHIKO
4 granted patents·1 pending application·13 citations·filing 2001–2004
66Inventor score
Technology areasE21B
Files withKOMATSU MFG CO LTD4
Top patents by PatentIndex Score
5 records- 0141US6637525B2Ground drilling machine and rod exchanger utilized thereforKOMATSU MFG CO LTD·Filed 2001·Granted Oct 28, 2003·7 cites·4 claims
- 0237US7128168B2Reamer apparatus for ground boring machineKOMATSU MFG CO LTD·Filed 2004·Granted Oct 31, 2006·6 cites·6 claims
- 0334US6932171B2Ground drilling machineKOMATSU MFG CO LTD·Filed 2003·Granted Aug 23, 2005·0 cites·4 claims
- 0429US6913094B2Leading body for ground drilling and ground drilling machineKOMATSU MFG CO LTD·Filed 2003·Granted Jul 5, 2005·0 cites·2 claims
- 0526US2005034896A1Pipe burying methodFiled 2004·Application pending·0 cites
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