Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5538362 | Shield excavator | Toshio Akesaka | 1996-07-23 |
| 5190407 | Rectangular shield excavating machine | Toshio Akesaka | 1993-03-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5538362 | Shield excavator | Toshio Akesaka | 1996-07-23 |
| 5190407 | Rectangular shield excavating machine | Toshio Akesaka | 1993-03-02 |