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Group IV Semiconductor, Inc.

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),

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 based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

13 Patents

#72 in Ottawa

#1,161 in Canada

#44,988 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)

Please report any incorrect information to [email protected]

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