Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6628338 | Direct drive electric motor apparatus incorporating slip ring assembly | Masafumi Sakamoto | 2003-09-30 |
| 6603842 | Method and apparatus for connecting a television interphone monitor system to a concierge station over the internet | — | 2003-08-05 |