Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4908729 | Lightning arrester monitor | Takeo Yoshioka, Masahiro Kobayashi, Tadao Minagawa | 1990-03-13 |
| 4203143 | Protective device | Mitsumasa Imataki, Tsutomu Egashira | 1980-05-13 |