Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE48419 | Pay at the table system | Steven L. Harrington, Mark Christan Speich | 2021-02-02 |
| RE47144 | Pay at the table system | Steven L. Harrington, Mark Christan Speich | 2018-11-27 |
| 8306860 | Pay at the table system | Steven L. Harrington, Mark Christan Speich | 2012-11-06 |
| 8306861 | Pay at the table system | Steven L. Harrington, Mark Christan Speich | 2012-11-06 |
| 7457767 | Pay at the table system | Steven L. Harrington, Mark Christan Speich | 2008-11-25 |
| 6882285 | PDA watch | Steven L. Harrington, Mark Christian Speich | 2005-04-19 |