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Pinckney, MI, United States of America

Charles L Gray, Jr

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This inventor holds 82 USPTO granted patents and 6 published patent applications and 9 EPO patents, primarily in Hydraulic Hybrid Vehicles (CPC class F02M2-507). Top assignees: The United States of America as Represented by the Administrator of the U.S. Environmental Protection Agency, The United States of America as Represented by the Administrator of the. Active years: 1996-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Charles L Gray, Jr. Retrieved from https://idiyas.com/inventor/charles-l-gray-jr

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 82 

% Patents Active = 28.0

 

Average Co-Inventor Count = 1.2

ph-index = 23

Forward Citations = 1,981(Granted Patents)

Forward Citations (Not Self Cited) = 1,735(Dec 10, 2025)


Inventors with similar research interests:


    Location History:

    • Pickney, MI (US) (1996 - 2011)
    • Pinckney, MI (US) (1996 - 2016)

    Company Filing History:

    goldMedal73 out of 133 
     
    The United States of America as Represented by the Administrator of the U.S. Environmental Protection Agency
     patents
    silverMedal9 out of 2,546 
     
    The United States of America as Represented by the Administrator of the
     patents

    Years Active: 1996-2016

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    Areas of Expertise:
    Hydraulic Hybrid Vehicles
    Pump/Motor Efficiency
    Modular Drivetrain
    Safe Operation
    Dual Fuel Combustion
    Turbocharging System
    Variable Displacement
    Engine-Off Steering
    Fuel Injector Nozzle
    Pressure Accumulator
    Fire Suppression System
    High-Pressure Intensifier
    82 patents (USPTO):Explore Patents
    1. 9346347 - Methods for safe operation of hydraulic hybrid vehicles with over-center pump/motors (2016-05-24),
    2. 9121395 - Method for assembling a bent-axis pump/motor (2015-09-01),
    3. 8985089 - Low temperature dual fuel combustion utilizing diesel and methanol fuels (2015-03-24),
    4. 8893491 - Modular hydraulic hybrid drivetrain (2014-11-25),
    5. 8646565 - Hydraulic hybrid vehicle method of safe operation (2014-02-11),
    6. 8522546 - On-demand power brake system and method (2013-09-03),
    7. 8407999 - Efficiency turbocharged engine system with bottoming cycle, and method of operation (2013-04-02),
    8. 8387385 - Efficient bypass valve for multi-stage turbocharging system (2013-03-05),
    9. 8381851 - Methods of operating a series hybrid vehicle (2013-02-26),
    10. 8375982 - Hydraulic circuit and manifold with multifunction valve (2013-02-19),
    11. 8356985 - Safe over-center pump/motor (2013-01-22),
    12. 8356547 - Variable length bent-axis pump/motor (2013-01-22),
    13. 8306682 - Methods for optimizing the efficiency of a series hybrid vehicle with multi-gear transmission (2012-11-06),
    14. 8272356 - Two mode dual crankshaft engine (2012-09-25),
    15. 8177009 - Independent displacement opposing pump/motors and method of operation (2012-05-15),

    As an AI assistant of idiyas.com, specializing in innovations, inventions, inventors, patent attorneys, assignees, and patents, I present to you an article about the accomplished inventor Charles L Gray, Jr.

    Title: Innovator Spotlight: Charles L Gray, Jr. - Pioneering Safeguarding Technologies in Hybrid Vehicles

    Introduction:

    Charles L Gray, Jr., a proficient inventor hailing from Pinckney, MI (US), has made significant strides in the realm of automotive safety with his ingenious inventions.

    Latest Patents:

    Among his extensive portfolio of 82 patents, his latest creations focus on enhancing the safety features of hydraulic hybrid vehicles. His patents detail fail-safe methods for utilizing over-center pump/motors, ensuring safe startup and shutdown procedures, and assembling bent-axis pump/motors for optimal performance.

    Career Highlights:

    Throughout his illustrious career, Charles L Gray, Jr. has been at the forefront of technological advancements in the automotive industry. His dedication to innovation and commitment to safety have earned him recognition as a trailblazer in the field.

    Collaborations:

    Charles L Gray, Jr. has collaborated with esteemed entities such as The United States of America As Represented by the Administrator of the U.S. Environmental Protection Agency and The United States of America As Represented by the Administrator of the Environmental Protection Agency. His partnerships with industry experts like Karl H Hellman and Daniel W Barba have further enriched his groundbreaking work.

    Conclusion:

    In conclusion, Charles L Gray, Jr.'s remarkable contributions to the development of safety technologies in hybrid vehicles underscore his status as a visionary inventor. His patents not only demonstrate his expertise but also pave the way for a safer and more efficient automotive future.

    Should you require more information or have any specific inquiries about Charles L Gray, Jr., feel free to explore further on idiyas.com.

    Profile summary based on public USPTO records.
    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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