Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5600348 | Adjustable tip light pen | Douglas E. Loebertmann | 1997-02-04 |
| 4677428 | Cordless light pen | — | 1987-06-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5600348 | Adjustable tip light pen | Douglas E. Loebertmann | 1997-02-04 |
| 4677428 | Cordless light pen | — | 1987-06-30 |