Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5527135 | Method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus therefor | Mitsutoshi Hayashi, Shingo Nagashima, Minoru Kurashina, Makoto Kajiyama, Hideki Uno | 1996-06-18 |
| 5501548 | Method for controlling the direction of a shield tunneling machine and an apparatus therefor | Mitsutoshi Hayashi, Shingo Nagashima, Isao Fujimori | 1996-03-26 |
| 5484232 | Method for injecting lubricant and filler in the pipe-jacking method | Mitsutoshi Hayashi, Shingo Nagashina, Minoru Kurashina, Makoto Kajiyama, Hideki Uno | 1996-01-16 |