Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6241925 | Method of lining channels | Mitsunori Komori, Masato Koseki, Yuichi Banrai, Tomoyuki Minami, Seiji Mizukami +4 more | 2001-06-05 |
| 6109305 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Kenko Okamura, Shigeru Morishita, Masaru Murakami, Akira Adachi +4 more | 2000-08-29 |
| 6004073 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Kenko Okamura, Shigeru Morishita, Masaru Murakami, Akira Adachi +4 more | 1999-12-21 |
| 5615976 | Double walled pipe, jacking method and pipe end structure of leading pipe | Tomoya Fujimoto, Kenko Okamura, Shigeru Morishita, Masaru Murakami, Akira Adachi +4 more | 1997-04-01 |
| 5611979 | Fabrication method for a funnel liner | Mitsuo Ishitani | 1997-03-18 |
| 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 | Akitaka Fujita, 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 | Akitaka Fujita, Shingo Nagashima, Isao Fujimori | 1996-03-26 |
| 5484232 | Method for injecting lubricant and filler in the pipe-jacking method | Akitaka Fujita, Shingo Nagashina, Minoru Kurashina, Makoto Kajiyama, Hideki Uno | 1996-01-16 |
| 4605032 | Air vent device for fuel tank on vehicle | Kazunobu Nagaoka, Michihiro Ohkawa | 1986-08-12 |
| 4584963 | System for repairing joints in pipes laid underground | Akio Morinaga, Motoyuki Koga | 1986-04-29 |