Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836978 | Method for making vacuum circuit breaker electrodes | Ryuji Watanabe, Hisashi Andoh, Kinko Shimizu | 1989-06-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836978 | Method for making vacuum circuit breaker electrodes | Ryuji Watanabe, Hisashi Andoh, Kinko Shimizu | 1989-06-06 |