Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12270235 | Counterbalance hinge assembly | Robert Walden, Daye Zhang | 2025-04-08 |
| 12270238 | Counterbalance hinge assembly | Robert Walden, Daye Zhang | 2025-04-08 |
| D1048857 | Cam | Robert Walden, Daye Zhang | 2024-10-29 |
| 10858788 | Monorail switch using a gravity-assisted actuating mechanism | — | 2020-12-08 |