Haruo Kojima

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Toki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Placer gold mining method, placer gold mining boat used in this met...
- Patent number 6,138,833
- Issue date Oct 31, 2000
- Jipangu Inc.
- Tamisuke Matsufuji
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING