Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6387157 | Mixed gas concentration regulating method and concentration regulating apparatus | — | 2002-05-14 |
| 6197090 | Method and apparatus for recovering a gas from a gas mixture | Takao Yamamoto | 2001-03-06 |
| 6123909 | Method and apparatus for purification of argon | Takao Yamamoto | 2000-09-26 |
| 6050106 | Ultra high purity nitrogen and oxygen generator unit | Takao Yamamoto | 2000-04-18 |
| 5373699 | Process for the production of nitrogen by cryogenic distillation of atmospheric air | Sophie Gastinne, Francois Venet, Bao Ha | 1994-12-20 |
| 5325674 | Process for the production of nitrogen by cryogenic distillation of atmospheric air | Sophie Gastinne, Francois Venet, Bao Ha | 1994-07-05 |
| 5220798 | Air separating method using external cold source | Takashi Nagamura | 1993-06-22 |