Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882740 | Frequency counter for counting a frequency and partly varied frequencies of a signal in real time | Yoshitaka Abe | 1989-11-21 |
| 4836210 | Ultrasonic analyzer | Akira Shiba, Isamu Yamada | 1989-06-06 |