Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5522223 | Pulse tube refrigerator | Etsuji Kawaguchi, Tomio Nishitani | 1996-06-04 |
| 5515685 | Pulse tube refrigerator | Tomio Nishitani, Etsuji Kawaguchi | 1996-05-14 |
| 5327729 | Simplified apparatus for producing liquid nitrogen | Etsuji Kawaguchi, Yukiya Sugasaki, Tsuyoshi Kanegae, Bungo Kondo | 1994-07-12 |