Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7350595 | Drilling device and drilling method | Kusuo Sato, Shigeru Mazaki | 2008-04-01 |
| 6394717 | High speed-perforating apparatus | Shigeru Mazaki, Kusuo Sato | 2002-05-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7350595 | Drilling device and drilling method | Kusuo Sato, Shigeru Mazaki | 2008-04-01 |
| 6394717 | High speed-perforating apparatus | Shigeru Mazaki, Kusuo Sato | 2002-05-28 |