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Eden Prairie, MN, United States of America

Cardinal Ig Company

USPTO Granted Patents = 103

% Expired Patents = 4.9

CIPO Patents = 2

EPO Patents = 15

Trademarks = 14

Forward Citations = 1,397

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76 inventors (with patents filed for the assignee):

Eric Bjergaard (18 out of 18 patents)

Andrew DeMiglio (18 out of 18 patents)

Robert Casper Buchanan (14 out of 14 patents)

4. Hari Atkuri (13 out of 13 patents)

5. Paul Trpkovski (13 out of 70 patents)

6. Nicholas Schleder (12 out of 12 patents)

7. Michael John Milewski (11 out of 11 patents)

8. Eric Berner (9 out of 9 patents)

9. Chad Peters (8 out of 8 patents)

10. Benjamin J Zurn (8 out of 8 patents)

11. Jingwei Zhang (7 out of 21 patents)

12. Michael Eul (6 out of 6 patents)

13. Curtis Lee Queck (6 out of 6 patents)

14. James E Larsen (6 out of 6 patents)

15. Patrick Gayout (5 out of 16 patents)

Core Competencies:

Switchable Glazing

Privacy Glazing

Edge Quality Control

Electrical Control Systems

Liquid Crystal Materials

Insulating Glass Units

Automated Processing

Variable Light Scattering

Muntin Bar Fabrication

Spacer Technology

Leakage Current Detection

Power Transfer Systems

103 patents: Sort by Forward Citations

1. 12601939 - Film-to-glass switchable glazing (2026-04-14),

2. 12596358 - Self-correcting edge quality in a glass tempering system (2026-04-07),

3. 12560920 - Self-correcting vertical flatness in a glass tempering system (2026-02-24),

4. 12498598 - Systems and methods for operating one or more electrically controllable privacy glazing structures (2025-12-16),

5. 12492083 - Shuttle system and method for transferring glass sheets between multiple conveyor systems (2025-12-09),

6. 12339532 - Staggered driving electrical control of a plurality of electrically controllable privacy glazing structures (2025-06-24),

7. 12320185 - Automated spacer processing systems and methods (2025-06-03),

8. 12296558 - Leakage current detection and control for one or more electrically controllable privacy glazing structures (2025-05-13),

9. 12255428 - Power transfer systems for movable privacy glazing structures (2025-03-18),

10. 12253783 - High performance privacy glazing structures (2025-03-18),

11. 12164186 - Electrically dynamic window structure with ultralow power consumption comprising a liquid crystal material that can switch between first and second optical transition states (2024-12-10),

12. 12030237 - Masking removal machines, and methods of masking removal (2024-07-09),

13. 12000203 - Privacy glazing structure with asymetrical pane offsets for electrical connection configurations (2024-06-04),

14. 11934055 - Electrical connection configurations for privacy glazing structures (2024-03-19),

15. 11826986 - Leakage current detection and control for one or more electrically controllable privacy glazing structures (2023-11-28),

Company Overview

Cardinal IG Company, based in Eden Prairie, MN, specializes in advanced privacy glazing technology, focusing on innovative solutions such as switchable glazing and variable light scattering. The company is dedicated to enhancing privacy and comfort in architectural applications through its expertise in electrical control systems and liquid crystal materials. With a commitment to quality, Cardinal IG also emphasizes edge quality control and automated processing in the production of insulating glass units, positioning itself as a leader in the glazing industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

103 Patents

#10 in Eden Prairie, MN

#95 in Minnesota

#3,694 in US

#7,590 in the World

Eden Prairie, MN, United States of America

Cardinal Ig Company

Forward Citations = 1,397

76 inventors:

Eric Bjergaard (18 out of 18 patents)

Andrew DeMiglio (18 out of 18 patents)

Robert Casper Buchanan (14 out of 14 patents)

4. Hari Atkuri (13 out of 13 patents)

5. Paul Trpkovski (13 out of 70 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Cardinal Ig Company. Retrieved from https://idiyas.com/company/cardinal-ig-company

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]

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