Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6140633 | Multi-optical-path photoelectric switch | Michiaki Oka | 2000-10-31 |
| 6111995 | Multi-optical-path photoelectric switch | Michiaki Oka | 2000-08-29 |
| 5818123 | Electrical system for electrically interconnecting a parent switch device to a child switch device | Toshiro Shinoto, Kazuhiro Makino | 1998-10-06 |