Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6281672 | Optical current transformer | Kiyohisa Terai, Masao Takahashi | 2001-08-28 |
| 5933238 | Optical current measurement device and method of manufacturing it | Masao Takahashi, Kiyohisa Terai | 1999-08-03 |
| 5915059 | Optical fiber cable and a method for manufacturing the same | Masao Takahashi, Keiko Matsumoto, Kiyohisa Terai | 1999-06-22 |
| 5844410 | Device for optically measuring physical quantity in power equipment and method of manufacturing the same | Kiyohisa Terai, Masao Takahashi, Keiko Matsumoto | 1998-12-01 |