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For the Inventor, By the Inventor

Quebec, Canada

Exfo Inc.


USPTO Granted Patents = 143

% Expired Patents = 6.3



Trademarks = 2

Forward Citations = 829

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102 inventors (with patents filed for the assignee):

goldMedal Stephane Perron (21 out of 21 patents)

silverMedal Michel Leclerc (19 out of 19 patents)

bronzeMedal Gang He (18 out of 26 patents)

4.  Bernard Ruchet (18 out of 19 patents)

5.  Mario L'Heureux (14 out of 14 patents)

6.  Daniel Gariepy (14 out of 15 patents)

7.  Olivier Patry (11 out of 29 patents)

8.  Normand Cyr (10 out of 11 patents)

9.  Stéphane Perron (10 out of 10 patents)

10.  Robert Baribault (9 out of 14 patents)

11.  Michel Leblanc (8 out of 10 patents)

12.  Hongxin Chen (8 out of 9 patents)

13.  Sylvain Nadeau (7 out of 9 patents)

14.  Michael Simard (6 out of 6 patents)

15.  Mathias Westlund (5 out of 13 patents)


Core Competencies:
Optical Fiber
Inspection Systems
RF Spectrum
Testing Instruments
Quality Control
OTDR Measurement
Network Performance
Fronthaul Monitoring
Power Measurement
Connector Endfaces
Multi-Fiber Cables
Augmented Reality

143 patents:

1. D1146995 - Display screen or portion thereof with graphical user interface (2026-09-08),
2. 12730238 - Method and apparatus of distributed acoustic sensing (2026-09-08),
3. 12723945 - Visual fault locator (VFL) with variable gain control (2026-09-01),
4. 12716810 - Adjusting the power level of a visible light source based on a characterization of an optical fiber under test (2026-08-25),
5. D1142479 - DISPLAY SCREEN OR PORTION THEREOF WITH GRAPHICAL USER INTERFACE (2026-08-18),
6. 12704435 - Optical test device and connector adapter (2026-08-11),
7. 12687459 - Method and apparatus of single-ended polarization mode dispersion measurement (2026-07-21),
8. 12669626 - Method and apparatus of distributed acoustic sensing (2026-06-30),
9. 12663308 - Method and apparatus of distributed acoustic sensing (2026-06-23),
10. 12520253 - RF spectrum analyzer for TDD transmission that maintains synchronization between UL and DL with a single antenna (2026-01-06),
11. 12442719 - Duplex optical power loss measurement using an adaptor device (2025-10-14),
12. 12429653 - Adapter tip and microscope system for inspecting duplex fiber-optic connector endfaces (2025-09-30),
13. D1079512 - Portable test instrument (2025-06-17),
14. D1078515 - Portable test instrument (2025-06-10),
15. D1068515 - Optical fiber inspection probe (2025-04-01),
EXFO Inc. (NASDAQ: EXFO) is a leading provider of innovative test, monitoring and analytics solutions for the telecommunications industry. Their solutions enable network operators to enhance efficiency, reduce costs and deliver superior quality of service to their customers. With a portfolio that includes fiber optic, wireless and 5G testing solutions, EXFO serves a diverse range of customers worldwide. Their products are trusted by telecom companies, network equipment manufacturers and numerous other organizations in the telecommunications ecosystem.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Exfo Inc.
143 Patents

#3 in Quebec

#85 in Canada

#5,677 in the World

Quebec, CA
Quebec, Canada

Exfo Inc.

Forward Citations = 829

102 inventors:

goldMedal Stephane Perron (21 out of 21 patents)

silverMedal Michel Leclerc (19 out of 19 patents)

bronzeMedal Gang He (18 out of 26 patents)

4.  Bernard Ruchet (18 out of 19 patents)

5.  Mario L'Heureux (14 out of 14 patents)

Please report any incorrect information to [email protected]
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