YH

Yoshimasa Hayama

HC Hitachi Koki Co.: 4 patents #273 of 888Top 35%
HC Hitachi Koki Haramachi Co.: 1 patents #5 of 9Top 60%
KC Koki Holdings Co.: 1 patents #124 of 215Top 60%
Overall (All Time): #804,781 of 4,157,543Top 20%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
11559761 Dust collector Daisuke Kakegawa 2023-01-24
8919235 Cutting apparatus Junichi Sudou, Toshihiro Enya 2014-12-30
7966691 Dust collector Kumio Takahashi, Masahiro Inaniwa, Daisuke Kakegawa 2011-06-28
7871463 Dust collection device Daisuke Kakegawa, Kumio Takahashi, Masahiro Inaniwa 2011-01-18
7296323 Dust collector Daisuke Kakegawa, Syuichi Okada, Hidekazu Harada, Shigeru Shinohara 2007-11-20
D328080 Electric plane Eisaku Oka, Hiromi Ozawa, Yoshio Matsumoto 1992-07-21