KM

Kiyoshi Masujima

HI Hitachi: 1 patents #17,742 of 28,497Top 65%
Overall (All Time): #3,867,781 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4984974 Screw type vacuum pump with introduced inert gas Koutarou Naya, Kazuaki Shiinoki, Tadashi Hayakawa, Riichi Uchida, Katsumi Matsubara 1991-01-15