Issued Patents All Time
Showing 1–4 of 4 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, Akitaka Fujita, Shingo Nagashima, Minoru Kurashina, Hideki Uno | 1996-06-18 |
| 5484232 | Method for injecting lubricant and filler in the pipe-jacking method | Mitsutoshi Hayashi, Akitaka Fujita, Shingo Nagashina, Minoru Kurashina, Hideki Uno | 1996-01-16 |
| 5404308 | Numerical control (NC) device to control feed speed of tool based on speed of spindle and amount of change of spindle speed | — | 1995-04-04 |
| 5102201 | Shield tunnelling machine | Toshio Akesaka | 1992-04-07 |