Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8003931 | Optical vend-sensing system for control of vending machine | David A. Sprankle | 2011-08-23 |
| 7988015 | Adjustable storage rack for a vending machine | David A. Sprankle | 2011-08-02 |