Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823368 | Open counter for low energy electron detection with suppressed background noise | Masayuki Uda, Yukio Tomioka, Chikara Kouno, Hiroshi Ishida | 1989-04-18 |
| 4796205 | Fire alarm system | Hiromitsu Ishii | 1989-01-03 |