Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5353884 | Positioning device for a member and drilling system employing said positioning device | Toshiaki Misawa, Jun Sakata, Akio Ikeda | 1994-10-11 |
| 5316090 | Attitude control device and drilling-direction control device | Shoji Kuwana, Akio Ikeda | 1994-05-31 |
| 5307885 | Attitude and drilling-direction control device | Shoji Kuwana, Akio Ikeda | 1994-05-03 |