Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6230868 | System for metering multiple parking spaces | Gorm Tuxen, Todd Magness, Paul Descombes, Ralph H. Carmen | 2001-05-15 |
| 5805083 | Electronic parking meter operating system | Joseph H. Sutton, Ralph H. Carmen | 1998-09-08 |
| 5063586 | Apparatus for semiconductor lithography | Tanya E. Jewell | 1991-11-05 |