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Assignee

• Hitachi Koki Co.

Inventors

• Katsuhiro Oomori (40 patents)
• Mizuho Nakamura (16 patents)
• Yutaka Ito (201 patents)
• Nobuhiro Takano (81 patents)
• Tomomasa Nishikawa (79 patents)
• Hironori Mashiko (14 patents)
• Shigeru Takahashi (63 patents)

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