Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479011 | Method of scrapping furnace bottom section of blast furnace | Hirotaka Kojima, Mitsuru Kiguchi, Hiroyuki Yasuhara, Yasuo Ochiai | 2002-11-12 |
| 6403021 | Method of constructing a blast furnace body and lifting transfer apparatus | Hirotaka Kojima | 2002-06-11 |
| 6386325 | Elevator system with hall scanner for distinguishing between standing and sitting elevator passengers | — | 2002-05-14 |