Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797068 | Vacuum evacuation system | Tadashi Hayakawa, Kazuaki Shiinoki, Sinji Mitsuhashi | 1989-01-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797068 | Vacuum evacuation system | Tadashi Hayakawa, Kazuaki Shiinoki, Sinji Mitsuhashi | 1989-01-10 |