For the Inventor, By the Inventor

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Irving, TX, United States of America

E.f. Johnson Company

USPTO Granted Patents = 85

CIPO Patents = 2

Trademarks = 15

Forward Citations = 1,384

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61 inventors (with patents filed for the assignee):

Arindam Roy (27 out of 30 patents)

Donald R Bauman (8 out of 29 patents)

Keith W Barnes (8 out of 63 patents)

4. Marshall Jobe (7 out of 8 patents)

5. Jeffery E Benshetler (7 out of 8 patents)

6. Philip A Keefer (7 out of 7 patents)

7. Troy V Frandsen (7 out of 7 patents)

8. Larry Emmett (6 out of 6 patents)

9. Dulie Reavill (6 out of 6 patents)

10. Michael E Mihelich (6 out of 6 patents)

11. Howard N Brace (6 out of 17 patents)

12. William Earl Dunnigan (5 out of 6 patents)

13. Jerry J Conley (5 out of 6 patents)

14. Linda M Trine (5 out of 9 patents)

15. Chander M Wahi (5 out of 6 patents)

Core Competencies:

Land Mobile Radio

Distributed Simulcast Architecture

Interoperability Gateway

Dynamic Channel Allocation

Automatic Volume Control

Electroluminescent Control Head

Mobility Management

Encryption of Messages

Trunking Integration

Peer-to-Peer Communication

Multicast Communications

Bandwidth Management

85 patents: Sort by Forward Citations

1. 12316437 - Distributed land mobile radio architectures (2025-05-27),

2. 11936466 - Distributed land mobile radio architectures (2024-03-19),

3. 11496212 - Distributed simulcast architecture (2022-11-08),

4. 11445336 - Land mobile radio dispatch console (2022-09-13),

5. 11374546 - Automatic volume control for land mobile radio (2022-06-28),

6. 10880000 - Distributed simulcast architecture (2020-12-29),

7. 10791566 - System and method for dynamic channel allocation (2020-09-29),

8. 10749737 - Interoperability gateway for land mobile radio system (2020-08-18),

9. 10643540 - Control head with electroluminescent panel in land mobile radio (2020-05-05),

10. 10559259 - Control head with electroluminescent panel in land mobile radio (2020-02-11),

11. 10548108 - System and method for providing mobility management and out-of-coverage indication in a conventional land mobile radio system (2020-01-28),

12. 10548025 - System and method for simulating a land mobile radio system (2020-01-28),

13. 10492036 - Land mobile radio dispatch console (2019-11-26),

14. 10469047 - Automatic volume control for land mobile radio (2019-11-05),

15. 10461846 - Distributed simulcast architecture (2019-10-29),

E.F. Johnson Company is a leading provider of mission-critical communication solutions. With a history that spans over 90 years, they are renowned for their innovative products and services in the public safety and professional communications industries. E.F. Johnson specializes in developing reliable, advanced communication technologies that enable first responders, government agencies, and other organizations to stay connected and communicate effectively in challenging situations.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

85 Patents

#10 in Irving, TX

#236 in Texas

#4,217 in US

#8,656 in the World

Irving, TX, United States of America

E.f. Johnson Company

Forward Citations = 1,384

61 inventors:

Arindam Roy (27 out of 30 patents)

Donald R Bauman (8 out of 29 patents)

Keith W Barnes (8 out of 63 patents)

4. Marshall Jobe (7 out of 8 patents)

5. Jeffery E Benshetler (7 out of 8 patents)

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