Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561147 | Hinge which facilitates opening door after the gate frame is distorted | Yoshiaki Katoh | 1985-12-31 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561147 | Hinge which facilitates opening door after the gate frame is distorted | Yoshiaki Katoh | 1985-12-31 |