Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9944575 | Methane gas concentration method | Shota KAWASHIMA | 2018-04-17 |
| 9732297 | Gas purification method | Shota KAWASHIMA, Kenji Seki, Yuhei Morita | 2017-08-15 |
| 8974575 | Method of enriching combustible gas | Tamotsu Kotani | 2015-03-10 |
| 8940081 | Combustible gas enrichment apparatus | Hajime Morioka, Tamotsu Kotani | 2015-01-27 |
| 8932387 | Enrichment system for combustible gas | Hajime Morioka | 2015-01-13 |