Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6149346 | Method for replacement of existing pipes and device for carrying out the method | Nobuhisa Takamatsu, Takayuki Kurobe, Toshio Hirai | 2000-11-21 |
| 5797202 | Vertical hole excavating machine | — | 1998-08-25 |
| 5538362 | Shield excavator | Kazuto Hamada | 1996-07-23 |
| 5393172 | Shield tunneling machine | — | 1995-02-28 |
| 5392897 | Conveyor | — | 1995-02-28 |
| 5370479 | Shielding apparatus | — | 1994-12-06 |
| 5296915 | Method and apparatus for controlling direction of excavating machine | — | 1994-03-22 |
| 5193938 | Method and apparatus for laying pipe | — | 1993-03-16 |
| 5190407 | Rectangular shield excavating machine | Kazuto Hamada | 1993-03-02 |
| 5157982 | Rotary actuator | Takashi Ogawara | 1992-10-27 |
| 5123708 | Shield tunnelling machine | — | 1992-06-23 |
| 5102201 | Shield tunnelling machine | Makoto Kajiyama | 1992-04-07 |
| 5078545 | Method for boring hole in the ground and apparatus therefor | — | 1992-01-07 |
| 5061120 | Direction correcting device for shield tunnelling machine | — | 1991-10-29 |
| 5054976 | Inside processing apparatus | Takashi Ogawara | 1991-10-08 |
| 5050727 | Conveying method and conveyor apparatus | — | 1991-09-24 |
| 5035539 | Liner for pipeline repair and method for repairing pipelines | Takayuki Kawafuji, Sinkiti Ooka | 1991-07-30 |
| 5013189 | Intermediate pipe-jacking apparatus | — | 1991-05-07 |
| 4964580 | Crushing machine | — | 1990-10-23 |
| 4936441 | Vertical type conveyor | — | 1990-06-26 |
| 4915543 | Existing pipeline renewing method and apparatus therefor | — | 1990-04-10 |
| 4898498 | Thrust transmitting device | — | 1990-02-06 |
| 4886394 | Shield tunneling machine | — | 1989-12-12 |
| 4886396 | Existing pipeline renewing method and apparatus therefor | — | 1989-12-12 |
| 4874268 | Method and apparatus for building pipeline and shield tunnelling machine | — | 1989-10-17 |