Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7847935 | Method and apparatus for gas concentration quantitative analysis | Yoshihiro Osawa | 2010-12-07 |
| 7251035 | Optical cell measurement apparatus | Koichi Oka | 2007-07-31 |
| 7176464 | Method of and apparatus for determining the amount of impurity in gas | Koichi Oka | 2007-02-13 |