Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667841 | Methods of lining the internal surface of a pipe | Shigeru Toyoda, Masaaki Itagaki | 1997-09-16 |
| 5632818 | Liquid injection apparatus for use in a method of lining the internal surface of a pipe | Shigeru Toyoda, Masaaki Itagaki | 1997-05-27 |
| 5609186 | Methods of lining the internal surface of a pipe | Shinobu Satake, Tadao Yahata, Takashi Shigefuji, Shigeru Toyoda, Masaaki Itagaki | 1997-03-11 |
| 5590689 | Method for lining the internal surface of a pipe | Shigeru Toyoda, Masaaki Itagaki, Nobukatsu Ike, Kenji Ohshima | 1997-01-07 |