Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866393 | Method of diagnosing the deterioration of a zinc oxide type lightning arrester utilizing vector synthesis | Hiromi Iwai, Masatoshi Nakajima, Hiroshi Asaga, Satoru Shiga, Yoshihiro Tanabe | 1989-09-12 |