For the Inventor, By the Inventor

Enter assignee name

Waterloo, Canada

Northern Digital Inc.

USPTO Granted Patents = 48

% Expired Patents = 4.2

CIPO Patents = 5

EPO Patents = 4

Trademarks = 11

Forward Citations = 1,844

Loading Chart...

Loading Chart...

53 inventors (with patents filed for the assignee):

Stefan R Kirsch (11 out of 11 patents)

Mark R Schneider (10 out of 39 patents)

Westley S Ashe (7 out of 20 patents)

4. Georg Brunner (7 out of 7 patents)

5. Christian J Schilling (6 out of 7 patents)

6. Stephen Eldon Leis (5 out of 5 patents)

7. Athanasios Tommy Balkos (5 out of 5 patents)

8. Larry Chen (5 out of 5 patents)

9. Shaulaine White (5 out of 5 patents)

10. John M Nieminen (4 out of 5 patents)

11. Andrew Wiles (3 out of 3 patents)

12. Nikolai Mikuszeit (3 out of 3 patents)

13. Derek Peter Zwambag (3 out of 3 patents)

14. Richard Van Wijngaarden (2 out of 2 patents)

15. William Petrow (2 out of 6 patents)

Core Competencies:

Electromagnetic Tracking

Position Measurement

Retro-Reflective Markers

Sensor Compensation

Magnetic Fields

Eddy Current Detection

Calibration Techniques

Optical Sensors

Multi-Field Tracking

Interference Reduction

Coordinate Systems

Ferrofluid Sensors

48 patents: Sort by Forward Citations

1. 12758326 - Electromagnetic sensor (2026-10-13),

2. 12687410 - Reconfigurable transmitter array for electromagnetic tracking systems (2026-07-21),

3. 12616390 - Electromagnetic tracking and position measurement system having interference reduction from nearby instrumentation by filtering time-division multiplexed signal via step function (2026-05-05),

4. 12582329 - Magneto-mechanical capsules (2026-03-24),

5. 12569311 - Fiber optic shape sensing management (2026-03-10),

6. 12544150 - Field generator orientation for magnetic tracking in planar field generating assemblies (2026-02-10),

7. 12498509 - Retro-reflective disc target having exposed retro-reflective beads (2025-12-16),

8. 12324633 - Electromagnetic sensor (2025-06-10),

9. 12313867 - Textured retro-reflective marker (2025-05-27),

10. 12274515 - Electromagnetic position measurement system with sensor parasitic loop compensation (2025-04-14),

11. 12271009 - Retro-reflective marker with uniformly distributed microelements (2025-04-08),

12. 12257005 - Tracking a sensor that includes a ferrofluid (2025-03-25),

13. 12207888 - Magnetic tracking calibration via distortion correction for electromagnetic fields using inside-out tracking (2025-01-28),

14. 12178564 - Electromagnetic tracking and position measurement system having interference reduction from nearby instrumentation by filtering time-division multiplexed signal via step function (2024-12-31),

15. 12078825 - Textured retro-reflective marker (2024-09-03),

Company Overview

Northern Digital Inc., based in Waterloo, Canada, specializes in advanced tracking systems and position measurement technologies. The company focuses on electromagnetic tracking, utilizing retro-reflective markers and sophisticated sensor calibration techniques to enhance accuracy in various applications. Their expertise extends to addressing challenges such as magnetic field distortion and eddy current detection, making them a key player in the development of precise coordinate systems for diverse industries, including healthcare, virtual reality, and robotics.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

48 Patents

#11 in Waterloo

#289 in Canada

#14,550 in the World

Waterloo, Canada

Northern Digital Inc.

Forward Citations = 1,844

53 inventors:

Stefan R Kirsch (11 out of 11 patents)

Mark R Schneider (10 out of 39 patents)

Westley S Ashe (7 out of 20 patents)

4. Georg Brunner (7 out of 7 patents)

5. Christian J Schilling (6 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Northern Digital Inc.. Retrieved from https://idiyas.com/company/northern-digital

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

Loading…