Issued Patents All Time
Showing 76–95 of 95 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6075842 | Text enhanced telephony | Kevin R. Colwell | 2000-06-13 |
| 6075841 | In-line text display for telephone terminal employing data filtering | Kevin Colwell, Ronald W. Schultz, Troy Vitek | 2000-06-13 |
| 5978654 | Alphanumeric paging entry system | Kevin R. Colwell | 1999-11-02 |
| 5974116 | Personal interpreter | Kevin R. Colwell | 1999-10-26 |
| 5909482 | Relay for personal interpreter | — | 1999-06-01 |
| D405793 | Paging message device | Peter Kirschhofer, Neil Johan Schmertmann | 1999-02-16 |
| 5809425 | Gateway for low cost alphanumeric paging entry system | Kevin R. Colwell | 1998-09-15 |
| 5724405 | Text enhanced telephony | Kevin R. Colwell | 1998-03-03 |
| 5604786 | Telephone with unified features for hearing and deaf users | Kevin R. Colwell, Ronald W. Schultz, Troy Vitek | 1997-02-18 |
| 5581593 | Combination telephone and alphanumeric entry device | Kevin R. Colwell, Troy Vitek, Mark C. Terranova, Chuck Burk, Peter Fowler +5 more | 1996-12-03 |
| 5517548 | Telecommunication device operating under an enhanced TDD protocol | Kevin Colwell, Ronald W. Schultz, Jeffrey L. Hilliard, Troy Vitek | 1996-05-14 |
| D364865 | Text telephone | Ronald W. Schultz, Kevin R. Colwell, Robert Schoenbeck | 1995-12-05 |
| 5432837 | Telecommunication device for the deaf with automatic transmission capability | Kevin Colwell, Ronald W. Schultz, Jeffrey L. Hilliard, Troy Vitek | 1995-07-11 |
| 5351288 | Voice bridge for a relay center | Kevin Colwell, Edward T. Gisske, Ronald W. Schultz | 1994-09-27 |
| 5327479 | Telecommunication device for the deaf with interrupt and pseudo-duplex capability | Kevin Colwell, Ronald W. Schultz | 1994-07-05 |
| 5325417 | Telecommunication device for the deaf with automatic self-identification | Kevin Colwell, Ronald W. Schultz | 1994-06-28 |
| 5081673 | Voice bridge for relay center | Kevin R. Colwell | 1992-01-14 |
| 4959847 | Telecommunications device with automatic code detection and switching | Kevin R. Colwell | 1990-09-25 |
| 4897868 | Public terminal receptacle | Rodney D. Borst, Kevin R. Colwell | 1990-01-30 |
| 4777469 | Public terminal receptacle | Rodney D. Borst, Kevin R. Colwell | 1988-10-11 |