Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10242301 | Superimposed QR code for dispenser and replaceable reservoir | Heiner Ophardt, David R. Duncan | 2019-03-26 |
| 10178928 | Interactive display device | Heiner Ophardt, David R. Duncan | 2019-01-15 |