Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914859 | Automatic door safety system | Lance Wikkerink, Harry Nguyen | 1990-04-10 |
| 4866881 | Automatic door safety system | Richard A. Morrow, Lance Wikkerink, Harry V. Nquyen | 1989-09-19 |
| 4577437 | Automatic door object sensing system | Harry Nguyen | 1986-03-25 |