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Canadian Patents & Development Ltd.

USPTO Granted Patents = 424

CIPO Patents = 1

Forward Citations = 9,170

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617 inventors (with patents filed for the assignee):

Ira E Puddington (14 out of 15 patents)

William L Thayer (12 out of 14 patents)

Bryan D Sparks (11 out of 15 patents)

4. Kenneth O Hill (8 out of 31 patents)

5. Srinivasa Sourirajan (8 out of 11 patents)

6. Derwyn C Johnson (7 out of 23 patents)

7. Ion I Inculet (7 out of 23 patents)

8. Oleh Kutowy (6 out of 18 patents)

9. Lorne Arthur Whitehead (6 out of 147 patents)

10. Paolo G Cielo (6 out of 15 patents)

11. Frederick Weldon Meadus (6 out of 6 patents)

12. John W Tanney (6 out of 6 patents)

13. Richard D Coleman (5 out of 11 patents)

14. Charles E Capes (5 out of 10 patents)

15. Gordon M Ritcey (5 out of 6 patents)

Core Competencies:

Bovine Viral Antigens

PCB Waste Degradation

Optical Imaging

Hydrogen Peroxide Production

Electromagnetic Power Conversion

Surface Mount Device Measurement

Optical Modulator Structures

Protease Processing

Catalytic Conversions

Food Insect Control Devices

Silica Recovery

Genetic Information Transfer

424 patents: Sort by Forward Citations

1. 5112756 - Continuous production of bovine Maedi-Visna-like viral antigens in Cf2Th (1992-05-12),

2. 4998624 - Method of separating carbonaceous components from particulate coal (1991-03-12),

3. 4980039 - Microwave-mediated degradation of PCB wastes (1990-12-25),

4. 4948211 - Method and apparatus for optical imaging using a small, flat, reflecting (1990-08-14),

5. 4946566 - Photochemical production of hydrogen peroxide (1990-08-07),

6. 4943811 - Dual polarization electromagnetic power reception and conversion system (1990-07-24),

7. 4941725 - All-optical planar modulator structure with channel waveguides (1990-07-17),

8. 4941256 - Automatic visual measurement of surface mount device placement (1990-07-17),

9. 4937520 - Instrument to measure the errors of apparent power meters (1990-06-26),

10. 4933916 - Phase measurements using pseudo-random code (1990-06-12),

11. 4931866 - Distributed coaxial light source producing constant target luminance (1990-06-05),

12. 4929798 - Pseudoadiabatic reactor for exothermal catalytic conversions (1990-05-29),

13. 4929553 - Protease for specific processing of secreted proteins (1990-05-29),

14. 4927635 - Device for controlling stored food insects (1990-05-22),

15. 4925574 - Purification of hemoglobin and modified hemoglobin by affinity (1990-05-15),

Canadian Patents & Development Ltd. (CPD) is a leading intellectual property consulting firm based in Canada. With over 20 years of experience, CPD offers a comprehensive range of services related to patents, trademarks, copyrights, and intellectual property management. Our team of experts provides innovative solutions to protect and monetize our clients' intellectual assets. Visit our website to learn more about our services and how we can help you achieve your intellectual property goals.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

424 Patents

#2 in Ottawa

#25 in Canada

#2,155 in the World

Canadian Patents & Development Ltd.

Forward Citations = 9,170

617 inventors:

Ira E Puddington (14 out of 15 patents)

William L Thayer (12 out of 14 patents)

Bryan D Sparks (11 out of 15 patents)

4. Kenneth O Hill (8 out of 31 patents)

5. Srinivasa Sourirajan (8 out of 11 patents)

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