Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5214728 | Light communication system | Masayuki Shigematsu, Izumi Sankawa | 1993-05-25 |
| 5136670 | Method for optical switching and an optical switch | Masayuki Shigematsu | 1992-08-04 |