Growing community of inventors

Middleton, WI, United States of America

Kevin A Colwell

Average Co-Inventor Count = 2.62

ph-index = 15

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 1,380

Kevin A ColwellRobert M Engelke (15 patents)Kevin A ColwellRonald W Schultz (6 patents)Kevin A ColwellTroy D Vitek (3 patents)Kevin A ColwellRodney D Borst (2 patents)Kevin A ColwellJeffrey L Hilliard (2 patents)Kevin A ColwellEdward Gisske (1 patent)Kevin A ColwellKevin A Colwell (15 patents)Robert M EngelkeRobert M Engelke (98 patents)Ronald W SchultzRonald W Schultz (8 patents)Troy D VitekTroy D Vitek (55 patents)Rodney D BorstRodney D Borst (23 patents)Jeffrey L HilliardJeffrey L Hilliard (4 patents)Edward GisskeEdward Gisske (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ultratec, Inc. (13 from 98 patents)

2. Other (2 from 832,891 patents)


15 patents:

1. 6307921 - Text enhanced telephony

2. 6075841 - In-line text display for telephone terminal employing data filtering

3. 6075842 - Text enhanced telephony

4. 5978654 - Alphanumeric paging entry system

5. 5974116 - Personal interpreter

6. 5809425 - Gateway for low cost alphanumeric paging entry system

7. 5724405 - Text enhanced telephony

8. 5517548 - Telecommunication device operating under an enhanced TDD protocol

9. 5432837 - Telecommunication device for the deaf with automatic transmission

10. 5351288 - Voice bridge for a relay center

11. 5327479 - Telecommunication device for the deaf with interrupt and pseudo-duplex

12. 5325417 - Telecommunication device for the deaf with automatic self-identification

13. 5081673 - Voice bridge for relay center

14. 4897868 - Public terminal receptacle

15. 4777469 - Public terminal receptacle

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as of
1/2/2026
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