Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7104008 | Door system with a pair of door panels connected by a swivel panel that swings back and forth for selectively opening and closing gateways in a compartment | — | 2006-09-12 |
| 6493991 | Revolving door system | Yoshinori Hamada | 2002-12-17 |