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Mitsuhiro Sugiyama — 1 Patent in 2021

NCNhk Spring Co.: 1 patents #14 of 79Top 20%
Overall (2021): #327,700 of 548,734Top 60%
1 Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11065641 Coil spring manufacturing method and coil spring manufacturing device Yoshimitsu Koyama, Tatsuya Watanuki 2021-07-20

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Minoru Sugiyama1
Michiaki Sugiyama1
Mikito Sugiyama1
Mitsuru Sugiura1