SD

Sadao Doi

IH Ihi: 1 patents #624 of 1,178Top 55%
Overall (All Time): #1,532,892 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8776382 Cutting instrument Hiroyuki Ochiai, Mitsutoshi Watanabe, Takashi Furukawa, Hiroki Yoshizawa, Yukihiro Shimoda 2014-07-15
5117918 Cultivator blade supporting structure Tohru Yamada, Tomiji Oguri, Taizo Yamamoto 1992-06-02
4697644 Cultivator nail supporting structure Tohru Yamada, Shungo Matsumoto, Taizo Yamamoto 1987-10-06