Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6452873 | Visually changing paper time indicator employing controllable barrier | David J. Haas | 2002-09-17 |
| 6446865 | Reflective badge security identification system | David J. Haas | 2002-09-10 |