| 6075841 |
In-line text display for telephone terminal employing data filtering |
Robert M. Engelke, Kevin Colwell, Troy Vitek |
2000-06-13 |
| 5604786 |
Telephone with unified features for hearing and deaf users |
Robert M. Engelke, Kevin R. Colwell, Troy Vitek |
1997-02-18 |
| 5517548 |
Telecommunication device operating under an enhanced TDD protocol |
Robert M. Engelke, Kevin Colwell, Jeffrey L. Hilliard, Troy Vitek |
1996-05-14 |
| D364865 |
Text telephone |
Robert M. Engelke, Kevin R. Colwell, Robert Schoenbeck |
1995-12-05 |
| 5432837 |
Telecommunication device for the deaf with automatic transmission capability |
Robert M. Engelke, Kevin Colwell, Jeffrey L. Hilliard, Troy Vitek |
1995-07-11 |
| 5351288 |
Voice bridge for a relay center |
Robert M. Engelke, Kevin Colwell, Edward T. Gisske |
1994-09-27 |
| 5327479 |
Telecommunication device for the deaf with interrupt and pseudo-duplex capability |
Robert M. Engelke, Kevin Colwell |
1994-07-05 |
| 5325417 |
Telecommunication device for the deaf with automatic self-identification |
Robert M. Engelke, Kevin Colwell |
1994-06-28 |
| 4421246 |
Biological tissue cassette |
Donald R. Graham |
1983-12-20 |