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Pullman, WA, United States of America

Schweitzer Engineering Laboratories, Inc.

USPTO Granted Patents = 742

CIPO Patents = 4

EPO Patents = 4

Trademarks = 62

Forward Citations = 5,880

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439 inventors (with patents filed for the assignee):

Edmund O Schweitzer, Iii (123 out of 127 patents)

David E Whitehead (66 out of 66 patents)

Armando Guzman-Casillas (59 out of 60 patents)

4. Bogdan Zdzislaw Kasztenny (53 out of 71 patents)

5. Normann Fischer (40 out of 40 patents)

6. Tony J Lee (40 out of 41 patents)

7. Veselin Skendzic (36 out of 46 patents)

8. Gregary C Zweigle (36 out of 36 patents)

9. Scott M Manson (33 out of 33 patents)

10. Mangapathirao Venkata Mynam (30 out of 30 patents)

11. Shankar V Achanta (29 out of 29 patents)

12. Krishnanjan Gubba Ravikumar (27 out of 32 patents)

13. Marcos A Donolo (27 out of 27 patents)

14. Colin Gordon (27 out of 27 patents)

15. Rhett Smith (27 out of 28 patents)

Core Competencies:

Event Analysis

Conductor Detection

GNSS Authentication

Redundancy Protocol

Differential Protection

Cybersecurity

Microgrid Stability

Electric Power Distribution

Fault Location Estimation

Software Defined Network

Power Flow Management

Surge-Immune Technology

742 patents: Sort by Forward Citations

1. 12526229 - Communication device operable to switch between multiple control plane types (2026-01-13),

2. 12506360 - Redundant generic object oriented substation event (GOOSE) messages with live and test power system data (2025-12-23),

3. 12504446 - Fault current sensor with adjacent phase fault immunity (2025-12-23),

4. 12500825 - Systems and methods for network traffic monitoring (2025-12-16),

5. 12500032 - Magnetic core winder for powerline-mounted devices (2025-12-16),

6. 12500026 - Multiphase power-harvesting sensor devices and systems (2025-12-16),

7. 12498938 - Basic input/output system (BIOS) boot check (2025-12-16),

8. 12481343 - Event analysis and display (2025-11-25),

9. 12462264 - Systems and methods for applying an identification pattern to an electronic device (2025-11-04),

10. 12461171 - Single phase broken conductor detection (2025-11-04),

11. 12449550 - GNSS authentication through multi-site observables and data comparisons (2025-10-21),

12. 12445236 - Parallel redundancy protocol error detection (2025-10-14),

13. 12418168 - High-impedance differential protection using a diversity of signals (2025-09-16),

14. 12395530 - Systems and methods for establishing a secure communication link in an electric power distribution system (2025-08-19),

15. 12395419 - Programmable network detection of network loops (2025-08-19),

Schweitzer Engineering Laboratories, Inc. (SEL) designs, manufactures, and supports a broad range of power system protection, control, and monitoring devices, as well as communications solutions. Founded in 1982, SEL has grown to become a global leader in innovative solutions for power systems. With a strong focus on research and development, SEL constantly strives to improve the reliability and security of electric power grids worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 20 2026

742 Patents

#1 in Pullman, WA

#9 in Washington

#658 in US

#1,313 in the World

Pullman, WA, United States of America

Schweitzer Engineering Laboratories, Inc.

Forward Citations = 5,880

439 inventors:

Edmund O Schweitzer, Iii (123 out of 127 patents)

David E Whitehead (66 out of 66 patents)

Armando Guzman-Casillas (59 out of 60 patents)

4. Bogdan Zdzislaw Kasztenny (53 out of 71 patents)

5. Normann Fischer (40 out of 40 patents)

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