Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7571143 | Software pay-per-use pricing | Edgar Circenis, Robert C. Lehr | 2009-08-04 |
| 6302292 | Ticket counting dispenser | Christopher E. Schafer, Ryan B. Gruhn, Philip R. Littler, Tim Caltrider, Ryan P. Littler +2 more | 2001-10-16 |