Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4265513 | Light switch | Shigeo Matsushita, Kazuhisa Kaede, Ikuo Mito, Shigetoki Sugimoto | 1981-05-05 |
| 4213677 | Light coupling and branching device using light focusing transmission body | Shigetoki Sugimoto, Shigeo Matsushita | 1980-07-22 |