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Ryosuke Hosoi — 2 Patents

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2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4381162	Drill having cutting edges with the greatest curvature at the central portion thereof	—	1983-04-26
4222690	Drill having cutting edges with the greatest curvature at the central portion thereof	—	1980-09-16