Lijun Gao

This inventor holds 48 USPTO granted patents and 4 published patent applications, plus 9 CIPO patents and 27 EPO patents, primarily in Electric Propulsion Systems. Top assignee: The Boeing Company. Active years: 2013-2026.

USPTO Granted Patents = 48 (Patent Applications = 4)

% Patents Active = 95.8

CIPO Patents = 9

EPO Patents = 27 (Patent Applications = 18)

Average Co-Inventor Count = 2.7

ph-index = 7

Forward Citations = 162(Granted Patents)

Location History:

Kent, WA (US) (2015 - 2022)
Renton, WA (US) (2013 - 2024)

Company Filing History:

48 out of 23,000

The Boeing Company

patents

Years Active: 2013-2026

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Areas of Expertise:

Electric Power Generation

Variable Frequency Motor

Turbofan Technology

Hybrid Propulsion

Modular Converter

Power System Regulation

Battery Management

Cryogenic Vapor Pressure

Synchronous Machine

Electrified Propulsion

EMI Filter Systems

Power Distribution Control

48 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12712223 - Battery Temperature Regulation System (2026-08-18),

2. 12656400 - Battery real-time internal short circuit detection (2026-06-16),

3. 12334785 - Architecture for an electric power generator for aviation (2025-06-17),

4. 12152539 - Direct drive electrically-geared turbofan (2024-11-26),

5. 11988154 - Direct drive electrically-geared turbofan (2024-05-21),

6. 11848634 - Method and system for operating a variable frequency independent speed motor in an extended speed range (2023-12-19),

7. 11482360 - Stator secondary windings to modify a permanent magnet (PM) field (2022-10-25),

8. 11431176 - Parallel modular converter architecture (2022-08-30),

9. 11146200 - Variable frequency independent speed motor control based on flux estimate (2021-10-12),

10. 11110811 - Thin haul hybrid electric propulsion system (2021-09-07),

11. 11025183 - Independent-speed-variable-frequency-generator-based constant frequency and narrow-band variable frequency power systems and methods (2021-06-01),

12. 11011928 - Bus transfer for a flight test system (2021-05-18),

13. 10840839 - Method and system for independent-speed-variable-frequency-generator-based power system voltage regulation (2020-11-17),

14. 10784757 - Synchronous machine with common motor/generator exciter stage (2020-09-22),

15. 10622931 - Negative-slope voltage-frequency for starting a variable frequency independent speed motor and speed control (2020-04-14),

Title: Innovative Contributions of Lijun Gao in Turbofan Technology

Introduction

Lijun Gao, a prominent inventor based in Renton, WA, has made significant strides in the field of turbofan technology, holding an impressive total of 45 patents. His work showcases a remarkable commitment to innovation in aerospace engineering, particularly in the development of efficient and advanced propulsion systems.

Latest Patents

One of Lijun Gao's latest patents focuses on a **Direct Drive Electrically-Geared Turbofan**. This innovative design incorporates a first magnetic gearbox assembly connected to the fan of a turbofan engine and a second magnetic gearbox assembly linked to the spool shaft. A sophisticated speed controller allows for the adjustment of the fan's rotational speed based on the spool shaft's speed, achieved by selectively coupling and decoupling the two magnetic gearboxes. Notably, this design features permanent magnet arrays and rotor windings separated by air gaps, which are instrumental in achieving high efficiency in operation.

Career Highlights

Throughout his career, Lijun Gao has worked at renowned organizations, including The Boeing Company. His extensive experience in aerospace engineering has positioned him as a key player in the development of cutting-edge technologies that push the boundaries of current aviation systems.

Collaborations

Gao's work has also involved collaborations with talented professionals in the field, such as Shengyi Liu and Kamiar J. Karimi. These partnerships have fostered an environment of shared knowledge and innovation, contributing to the successful development of advanced technologies in aerospace.

Conclusion

Lijun Gao's inventive spirit and expertise in turbofan engineering are evident through his numerous patents and professional collaborations. His contributions not only enhance the efficiency of current technologies but also pave the way for future innovations in the aerospace industry. As he continues to work on groundbreaking projects, the impact of his inventions on aviation technology is sure to be profound.