Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8715400 | Double vacuum pump apparatus, gas purification system provided with double vacuum pump apparatus, and exhaust gas vibration suppressing device in double vacuum pump apparatus | Kiyokazu Maruta, Hidenori Kuwata, Koichi Shima | 2014-05-06 |
| 6663691 | Method of recovering enriched gaseous oxygen | Morihiko Yamamoto, Hiroaki Sasano | 2003-12-16 |
| 5755856 | Process of recovering oxygen-enriched gas | Masanori Miyake, Hiroaki Sasano | 1998-05-26 |
| 5505765 | Method and apparatus for separating nitrogen-enriched gas | Shinichi Kaji | 1996-04-09 |
| 4985052 | Process for producing high purity oxygen gas from air | Kanji Ueda, Masahiro Inoue, Hitosi Someda | 1991-01-15 |
| 4955998 | Process for separating gas | Kanji Ueda, Masahiro Inoue | 1990-09-11 |
| 4917710 | Process for recovering oxygen enriched gas | Kanji Ueda, Masahiro Inoue, Hitosi Someda | 1990-04-17 |
| 4713100 | Adsorption apparatus | Iwamitsu Shiozawa | 1987-12-15 |
| 4684377 | Process for producing oxygen-enriched gas | Kanji Ueda, Masaru Uno | 1987-08-04 |
| 4661125 | Process for producing high concentration oxygen by a pressure-swing-adsorption method | Saburo Hayashi | 1987-04-28 |
| 4529412 | Process for obtaining high concentration argon by pressure-swing-adsorption | Saburo Hayashi, Hiroo Tsuchiya | 1985-07-16 |