Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9086701 | Pressure reducing apparatus | Masayuki Okitsu, Kenji Tsukamoto | 2015-07-21 |
| D644298 | Pressure regulator | Masayuki Okitsu, Kenji Tsukamoto | 2011-08-30 |
| D644299 | Pressure regulator | Masayuki Okitsu, Kenji Tsukamoto | 2011-08-30 |
| D640153 | Pressure regulator | Masayuki Okitsu, Kenji Tsukamoto | 2011-06-21 |
| D640154 | Pressure regulator | Masayuki Okitsu, Kenji Tsukamoto | 2011-06-21 |
| 6321772 | Vacuum pressure-adjusting apparatus | Teruo Uehara, Takashi Shirane | 2001-11-27 |