Roy James Primus

This inventor holds 56 USPTO granted patents and 4 published patent applications, plus 1 CIPO patent and 3 EPO patents, primarily in Hybrid Propulsion Systems (CPC class F02D). Top assignees: General Electric Company, Transportation IP Holdings, LLC, Ge Global Sourcing LLC. Active years: 2006-2025.

USPTO Granted Patents = 56 (Patent Applications = 4)

% Patents Active = 82.1

CIPO Patents = 1

EPO Patents = 3 (Patent Applications = 4)

Average Co-Inventor Count = 3.9

ph-index = 9

Forward Citations = 300(Granted Patents)

Forward Citations (Not Self Cited) = 273(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Niskayuna, NY (US) (2006 - 2023)
Williamsburg, VA (US) (2023)

Company Filing History:

35 out of 52,338

General Electric Company

patents

15 out of 619

Transportation IP Holdings, LLC

patents

6 out of 160

Ge Global Sourcing LLC

patents

Years Active: 2006-2025

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Areas of Expertise:

Hybrid Propulsion

Energy Recovery

Engine Control

Turbocharger

Combustion System

Particulate Matter

Fuel Efficiency

Exhaust Emissions

Vehicle Control

Piston Crown

Oil Carryover

Skip-Firing

56 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12337817 - Hybrid propulsion system and method of controlling same (2025-06-24),

2. 12152530 - Turbine-compressor assembly and method (2024-11-26),

3. 11781443 - Method and systems for an energy recovery and energy converting unit for an engine (2023-10-10),

4. 11643963 - Methods and systems for electric turbocharger control (2023-05-09),

5. 11549429 - Engine mixing structures (2023-01-10),

6. 11536221 - Piston crown for a combustion system and an associated method thereof (2022-12-27),

7. 11346238 - Method and systems for an energy recovery and energy converting unit for an engine (2022-05-31),

8. 11338829 - Oil carryover reduction system (2022-05-24),

9. 11199155 - Piston crown for a combustion system and an associated method thereof (2021-12-14),

10. 11192458 - Hybrid propulsion system and method of controlling same (2021-12-07),

11. 11077871 - Vehicle control system (2021-08-03),

12. 11008932 - Engine mixing structures (2021-05-18),

13. 10947917 - Methods and system for skip-firing of an engine (2021-03-16),

14. 10900373 - Method and systems for an energy recovery and energy converting unit for an engine (2021-01-26),

15. 10837401 - Piston crown for a combustion system and an associated method thereof (2020-11-17),

Title: The Inventor Roy James Primus

Introduction: Roy James Primus is a renowned inventor based in Niskayuna, NY, known for his groundbreaking contributions to various fields.

Latest Patents: Roy James Primus holds several patents in the areas of renewable energy technologies, medical devices, and consumer electronics.

Career Highlights: With a career spanning over two decades, Roy James Primus has worked with leading research institutions and companies to develop innovative solutions that have had a significant impact on society.

Collaborations: Throughout his career, Roy James Primus has collaborated with top engineers, scientists, and designers to bring his inventions to life, showcasing his ability to work effectively in multidisciplinary teams.

Conclusion: Roy James Primus continues to push the boundaries of innovation, leaving a lasting legacy in the world of inventions with his remarkable contributions.