Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5117191 | Apparatus for monitoring degradation of insulation of electrical installation | Shigenari Maezawa, Tomoaki Kageyama, Akio Sera, Fukuso Terunaga | 1992-05-26 |
| 4929903 | Method of and apparatus for assessing insulation conditions | Shigenari Maezawa, Tomoaki Kageyama, Keizaburo Ishikura, Akio Sera, Junji Suehiro | 1990-05-29 |
| 4897561 | Apparatus for and method of discriminating signals | Shigenari Maezawa, Tomoaki Kageyama, Keizaburo Ishikura, Akio Sera, Junji Suehiro | 1990-01-30 |