Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6980094 | Door control system and receiver | Manabu Matsubara | 2005-12-27 |
| 6975586 | Protection switching method and apparatus for passive optical network system | — | 2005-12-13 |
| 6919812 | Key lock-in prevention system | Akira Takee | 2005-07-19 |