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Group IV Semiconductor, Inc.

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USPTO Granted Patents = 13

% Expired Patents = 23.1

Forward Citations = 74

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15 inventors (with patents filed for the assignee):

Thomas W Macelwee (10 out of 20 patents)

George Chik (5 out of 5 patents)

Iain D Calder (5 out of 15 patents)

4. Carla Miner (4 out of 5 patents)

5. E Steven Hill (3 out of 3 patents)

6. Steven E Hill (3 out of 3 patents)

7. Howard Tweddle (2 out of 7 patents)

8. Stephen Naor (2 out of 3 patents)

9. Jean-Paul Noel (2 out of 6 patents)

10. Alasdair Patrick Rankin (1 out of 3 patents)

11. Marwan Albarghouti (1 out of 1 patent)

12. Yongbao Xin (1 out of 1 patent)

13. Dean Ducharme (1 out of 1 patent)

14. Peter Mascher (1 out of 1 patent)

15. Jacek Wojcik (1 out of 1 patent)

13 patents: Sort by Forward Citations

1. 8232611 - High quality gate dielectric for semiconductor devices and method of formation thereof (2012-07-31),

2. 8198638 - Light emitting device structure and process for fabrication thereof (2012-06-12),

3. 8093604 - Engineered structure for solid-state light emitters (2012-01-10),

4. 8089080 - Engineered structure for high brightness solid-state light emitters (2012-01-03),

5. 7923925 - Light emitting device with a stopper layer structure (2011-04-12),

6. 7923288 - Zinc oxide thin film electroluminescent devices (2011-04-12),

7. 7888686 - Pixel structure for a solid state light emitting device (2011-02-15),

8. 7839467 - Color Tuneable electroluminescent devices (2010-11-23),

9. 7800117 - Pixel structure for a solid state light emitting device (2010-09-21),

10. 7679102 - Carbon passivation in solid-state light emitters (2010-03-16),

11. 7616272 - Electroluminescent films for backlighting liquid crystal displays (2009-11-10),

12. 7122842 - Solid state white light emitter and display using same (2006-10-17),

13. 7081664 - Doped semiconductor powder and preparation thereof (2006-07-25),

Company Overview

Group IV Semiconductor, Inc. is a technology company based in Ottawa, Canada, specializing in the development and manufacturing of advanced semiconductor materials and devices. The organization focuses on innovative solutions in the field of electronics, particularly leveraging silicon carbide and other wide bandgap materials to enhance performance in power electronics and optoelectronics. Their research aims to address the growing demands for energy efficiency and high-performance applications across various industries, including automotive and renewable energy.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

13 Patents

#72 in Ottawa

#1,167 in Canada

#45,104 in the World

Group IV Semiconductor, Inc.

Forward Citations = 74

15 inventors:

Thomas W Macelwee (10 out of 20 patents)

George Chik (5 out of 5 patents)

Iain D Calder (5 out of 15 patents)

4. Carla Miner (4 out of 5 patents)

5. E Steven Hill (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Group IV Semiconductor, Inc.. Retrieved from https://idiyas.com/company/group-iv-semiconductor

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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