| 7489993 |
Vehicle tracking, communication and fleet management system |
John Coffee, Robert W. Lewis, Kevin Marvin |
2009-02-10 |
| 6892131 |
Vehicle tracking, communication and fleet management system |
John Coffee, Richard Rudow, Robert F. Allen, Mark Billings, Mark Louis Kirchner +4 more |
2005-05-10 |
| 6611755 |
Vehicle tracking, communication and fleet management system |
John Coffee, Richard Rudow, Robert F. Allen, Mark Billings, Mark Louis Kirchner +4 more |
2003-08-26 |
| 6052605 |
Continuous interference assessment and avoidance in a land mobile radio system |
Sheldon Kent Meredith |
2000-04-18 |
| 5913177 |
Traffic distribution analysis in a land mobile radio system |
Sheldon Kent Meredith |
1999-06-15 |
| 5457749 |
Electronic muffler |
John A. Cain, Dennis Barnes |
1995-10-10 |
| 5272286 |
Single cavity automobile muffler |
John Cain, Dennis Barnes |
1993-12-21 |
| 5133017 |
Noise suppression system |
John Cain, Jamie Chait, Dennis Barnes |
1992-07-21 |