HH

Hakumi Hagimoto

Overall (All Time): #1,665,159 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5032039 Underground excavator Yutaka Kashima, Norio Kondo, Tsutomu Tomisawa, Kiichi Honma 1991-07-16
4797031 Caisson sinking method Yutaka Kashima, Norio Kondo, Masami Inoue 1989-01-10
4607889 Shield tunnel boring machine Yutaka Kashima, Norio Kondo, Masumi Inoue 1986-08-26