HI

Hiroyasu ISHIGURO

JC Japan Drilling Co.: 1 patents #4 of 16Top 25%
Overall (All Time): #3,578,746 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6217258 Dual hoist derrick system for deep sea drilling Hiromitsu Yamamoto 2001-04-17