KN

Koutarou Naya

HI Hitachi: 2 patents #13,388 of 28,497Top 50%
Overall (All Time): #2,313,706 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4984974 Screw type vacuum pump with introduced inert gas Kazuaki Shiinoki, Tadashi Hayakawa, Kiyoshi Masujima, Riichi Uchida, Katsumi Matsubara 1991-01-15
4767284 Screw vacuum pump unit Kazuaki Shiinoki, Shinji Mitsuhashi, Tadashi Hayakawa, Riichi Uchida 1988-08-30