Redwood City, CA, United States of America

James Montague Cleeves

This inventor holds 146 USPTO granted patents and 19 published patent applications, plus 5 CIPO patents and 13 EPO patents, primarily in Internal Combustion Engines (CPC class F01L5-06). Top assignees: Matrix Semiconductor, Inc., Sandisk 3D LLC, Kovio, Inc.. Active years: 1984-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: James Montague Cleeves. Retrieved from https://idiyas.com/inventor/james-montague-cleeves

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

Calculating rank

USPTO Granted Patents = 146 (Patent Applications = 19)

% Patents Active = 61.6

CIPO Patents = 5

EPO Patents = 13 (Patent Applications = 17)

Average Co-Inventor Count = 2.1

ph-index = 32

Forward Citations = 6,288(Granted Patents)

Forward Citations (Not Self Cited) = 6,034(Dec 10, 2025)

Inventors with similar research interests:

Location History:

San Carlos, CA (US) (2014)
Redwood, CA (US) (2014 - 2015)
Redwood City, CA (US) (1984 - 2017)

Company Filing History:

31 out of 145

Matrix Semiconductor, Inc.

Pinnacle Engines Inc.

patents

5. 13 out of 3,597

Cypress Semiconductor Corporation

patents

6. 11 out of 108

Thin Film Electronics Asa

patents

7. 4 out of 161

Candescent Technologies Corporation

patents

8. 3 out of 4,791

National Semiconductor Corporation

Fairchild Camera and Instrument Corp.

patents

12. 1 out of 1,302

Fairchild Semiconductor Corporation

15. 3 out of 834,570

Other

patents

where one patent can have more than one assignee

Years Active: 1984-2017

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Areas of Expertise:

Internal Combustion Engine

Variable Compression Ratio

Sleeve Valve

High Efficiency

Memory Fabrication

Radio Frequency Identification

Charge Storage Devices

Dopant Layers

Surveillance Devices

Printed Integrated Circuitry

Thin Film Transistor

Semiconductor Compounds

146 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9745915 - Internal combustion engine (2017-08-29),

2. 9650951 - Single piston sleeve valve with optional variable compression ratio capability (2017-05-16),

3. 9528402 - Early exhaust valve opening for improved catalyst light off (2016-12-27),

4. 9400953 - Laser processing enabling radio frequency identification (RFID) customization (2016-07-26),

5. 9316150 - Variable compression ratio diesel engine (2016-04-19),

6. 9267486 - Multi-mode high efficiency internal combustion engine (2016-02-23),

7. 9243578 - Deceleration fuel shut off for carbureted engines (2016-01-26),

8. 9214243 - Three-dimensional nonvolatile memory and method of fabrication (2015-12-15),

9. 9206749 - Variable compression ratio systems for opposed-piston and other internal combustion engines, and related methods of manufacture and use (2015-12-08),

10. 9196641 - Printed dopant layers (2015-11-24),

11. 9194288 - High swirl engine (2015-11-24),

12. 9175609 - Control of combustion mixtures and variability thereof with engine load (2015-11-03),

13. 9171857 - Dense arrays and charge storage devices (2015-10-27),

14. 9165238 - Methods for manufacturing RFID tags and structures formed therefrom (2015-10-20),

15. 9016255 - Sealing of sleeve valves (2015-04-28),

Title: James Montague Cleeves: Innovations and Patents for the Future

Introduction:

James Montague Cleeves, based in Redwood City, CA (US), is a remarkable inventor and patent holder with a significant impact on the field of internal combustion engines. With an impressive portfolio of 145 patents, Cleeves has continuously pushed the boundaries of innovation to enhance engine performance and efficiency. This article explores his latest patents, career highlights, collaborations, and acknowledges his valuable contributions to the industry.

Latest Patents:

Cleeves' recent patents demonstrate his commitment to revolutionizing internal combustion engines. One notable invention is the internal combustion engine with facing pistons, eliminating the need for a traditional cylinder head. This design minimizes heat losses and effectively doubles the stroke, resulting in increased power output at higher revolutions per minute.

Another breakthrough patent developed by Cleeves is the single piston sleeve valve with variable compression ratio capability. This design allows the engine to achieve a higher compression ratio for improved efficiency or a lower compression ratio for reduced emissions. The integration of a moveable junk head, intake and exhaust ports, and a sleeve valve mechanism provides enhanced control over the engine's performance.

Career Highlights:

Throughout his illustrious career, James Montague Cleeves has showcased his pioneering spirit and dedication to innovation. Notable among his professional experiences are his contributions to Matrix Semiconductor, Inc. and Sandisk 3D LLC. These companies provided Cleeves a platform to explore cutting-edge technologies and collaborate with industry experts to turn his creative ideas into practical solutions.

Collaborations:

Cleeves' collaborations with talented individuals have significantly contributed to his success as an inventor. He has worked closely with skilled professionals like Vivek Subramanian and Mark G. Johnson. These collaborations fostered an environment of collective creativity and expertise, enabling Cleeves to refine his inventions and bring them to fruition.

Conclusion:

James Montague Cleeves's relentless pursuit of innovation has resulted in a formidable patent portfolio, especially in the realm of internal combustion engines. His latest patented designs showcase his desire to improve engine performance, efficiency, and control. It is through his contributions and collaborations that Cleeves has undoubtedly made a significant impact in shaping the future of the automotive industry. We eagerly anticipate further breakthroughs from this exceptional inventor, as he continues to inspire and revolutionize the field of internal combustion engines.

Profile summary based on public USPTO records.