HH

Hachiro Hatakeda

CC Chemical Grouting Co.: 1 patents #15 of 28Top 55%
Overall (All Time): #3,694,070 of 4,157,543Top 90%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5797465 Multi-shaft drilling unit Mitsuhiro Shibasaki, Hiroaki Kubo, Akira Mori, Tsutao Takahashi, Tetsuo Nakamura 1998-08-25