Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4630969 | Artificial island | Nobuyoshi Yashima | 1986-12-23 |
| 4571125 | Floating offshore structure | Hitoshi Narita, Nobuyoshi Yashima, Hiroshi Tabuchi | 1986-02-18 |
| 4519728 | Floating offshore structure | Hitoshi Narita, Nobuyoshi Yashima, Hiroshi Tabuchi | 1985-05-28 |
| 4457250 | Floating-type offshore structure | Hiroshi Tabuchi | 1984-07-03 |
| 4326822 | Artificial island for installing oil drilling equipment in ice covered sea areas | Nobuyoshi Yashima | 1982-04-27 |
| 4230423 | Ice-breaking apparatus for structure for use in icy waters | Mikihisa Komoto, Shoichi Yabuki, Tsuneo Inokawa | 1980-10-28 |
| 4198917 | Ice-breaking means for ships | Mikihisa Komoto, Shoichi Yabuki, Tsuneo Inokawa | 1980-04-22 |