Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8157130 | Gas cartridge | Keijiro Murayama, Katsuhiko Murayama, Masakazu Konishi | 2012-04-17 |
| 8025182 | Gas cartridge | Keijiro Murayama, Katsuhiko Murayama, Masakazu Konishi | 2011-09-27 |
| 7681758 | Gas cartridge | Keijiro Murayama, Katsuhiko Murayama, Masakazu Konishi | 2010-03-23 |