Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675773 | Transmission line protection system | Shingo Shirakawa, Seizo Nakano, Eichi Okamoto, Kenji Kohara | 1987-06-23 |
| 4587592 | Zinc oxide lightning protector | Kouichi Nakano, Seizo Nakano, Masatomo Sato | 1986-05-06 |
| 4321651 | Enclosed-type zinc-oxide surge arrester | Jun Ozawa, Yoshi Akatsu, Katsuji Shindo, Akio Mizukoshi, Seizo Nakano +1 more | 1982-03-23 |