YH

Yoji Hirota

MM Mitsubishi Mining: 2 patents #467 of 2,247Top 25%
MC Mitsubishi Mining & Cement Co.: 2 patents #30 of 110Top 30%
Overall (All Time): #2,348,981 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4600417 Cyclone Atsushi Sasaki, Hiromi Ohsaka, Mitsuharu Murakami, Masahiro Harada, Hirofumi Hatano 1986-07-15
4519822 Cyclone Hirofumi Hatano 1985-05-28