Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8749382 | Portable security container | Hermann Sterzinger, Peter Leicher | 2014-06-10 |
| 8528373 | Electronic cam assembly | Douglas E. Trent | 2013-09-10 |
| 8141399 | Electromechanical cylinder plug | — | 2012-03-27 |
| 8122746 | Electromechanical cylinder plug | — | 2012-02-28 |
| 7212098 | Portable security container | Douglas E. Trent, Hermann Sterzinger | 2007-05-01 |
| 6588243 | Electronic cam assembly | Douglas E. Trent | 2003-07-08 |
| 6209367 | Electronic cam assembly | Douglas E. Trent | 2001-04-03 |
| D424491 | Promotional display with art accents attachable to a vehicle sun visor | Douglas E. Trent | 2000-05-09 |
| 6005487 | Electronic security system with novel electronic T-handle lock | Charles E. Hall, Douglas E. Trent | 1999-12-21 |
| 5775148 | Universal apparatus for use with electronic and/or mechanical access control devices | Tim W. Layton | 1998-07-07 |
| 5745044 | Electronic security system | Douglas E. Trent, Charles E. Hall | 1998-04-28 |
| 5604489 | Alphanumeric input terminal | — | 1997-02-18 |
| 5319362 | Security system with security access database distributed among individual access devices | — | 1994-06-07 |
| D333972 | Housing for an electronic key reader | Charles E. Hall | 1993-03-16 |
| 5140317 | Electronic security system | Charles E. Hall | 1992-08-18 |
| 5086557 | Method of assembling electronic component systems | — | 1992-02-11 |
| 4998952 | Key for electronic and mechanical locks | Charles E. Hall | 1991-03-12 |