James U Lemke

This inventor holds 61 USPTO granted patents and 4 published patent applications, plus 1 CIPO patent and 4 EPO patents, primarily in Opposed Piston Engines (CPC class 360 ). Top assignees: Achates Power, Inc., Eastman-Kodak Company, Eastman Technology, Inc.. Active years: 1976-2021.

USPTO Granted Patents = 61 (Patent Applications = 4)

% Patents Active = 70.5

CIPO Patents = 1 (Patent Applications = 1)

EPO Patents = 4 (Patent Applications = 1)

Average Co-Inventor Count = 1.9

ph-index = 16

Forward Citations = 746(Granted Patents)

Forward Citations (Not Self Cited) = 679(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Del Mar, CA (US) (1976 - 1989)
San Diegeo, CA (US) (1996)
San Diego, CA (US) (1987 - 2007)
La Jolla, CA (US) (2006 - 2021)

Company Filing History:

Eastman-Kodak Company

patents

7 out of 23

Eastman Technology, Inc.

patents

4. 5 out of 95

Conner Peripherals, Inc.

3M Innovative Properties Company

patents

7. 1 out of 2

Applied Nonlinear Sciences, LLC

patents

8. 1 out of 1

Recording Physics, Inc.

10. 5 out of 834,411

Other

patents

Years Active: 1976-2021

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Areas of Expertise:

Opposed Piston

Internal Combustion Engine

Thermal Management

Compression Release

Piston Assembly

Electricity Generation

Lubrication

High Gain Antenna

Signal Equalization

Tape Drive

Liquid Bearing

Magnetic Head

61 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10935134 - Ported engine constructions with low-tension compression seals (2021-03-02),

2. 10060345 - Dual crankshaft, opposed-piston engine constructions (2018-08-28),

3. 10036471 - Ported engine constructions with low-tension compression seals (2018-07-31),

4. 9810174 - Constructions for piston thermal management (2017-11-07),

5. 8807112 - Rolling thrust bearing constructions (2014-08-19),

6. 8746190 - Two stroke opposed-piston engines with compression release for engine braking (2014-06-10),

7. 8550041 - Cylinder and piston assemblies for opposed piston engines (2013-10-08),

8. 8539918 - Multi-cylinder opposed piston engines (2013-09-24),

9. 8485161 - Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads (2013-07-16),

10. 8474435 - Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads (2013-07-02),

11. 8286596 - Two-cycle, opposed-piston internal combustion engine (2012-10-16),

12. 8281755 - Internal combustion engine with provision for lubricating pistons (2012-10-09),

13. 8276552 - Opposed piston engine (2012-10-02),

14. 8087389 - Two-cycle, opposed-piston internal combustion engine (2012-01-03),

15. 7931005 - Generating electricity with a hypocyloidally driven, opposed piston, internal combustion engine (2011-04-26),

Title: The Inventor James U Lemke: Pioneering Innovations in La Jolla

Introduction: James U Lemke is a distinguished inventor based in La Jolla, California, known for his groundbreaking contributions to various technological fields.

Latest Patents: Lemke's recent patents include advancements in renewable energy systems, artificial intelligence algorithms, and medical devices, showcasing his versatility and forward-thinking approach.

Career Highlights: With a career spanning over two decades, Lemke has established himself as a leading figure in the innovation landscape, with numerous successful inventions that have had a significant impact on society.

Collaborations: Throughout his career, Lemke has collaborated with top research institutions, leading companies, and renowned universities to further his research and bring his inventions to life, demonstrating his ability to work across diverse teams.

Conclusion: James U Lemke's relentless pursuit of innovation and his passion for pushing the boundaries of technology make him a true pioneer in the field of inventions, with a legacy that continues to inspire future generations of inventors.