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Hangzhou, China

Joulwatt Technology (Hangzhou) Co., Ltd.

USPTO Granted Patents = 40

Trademarks = 4

Forward Citations = 88

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31 inventors (with patents filed for the assignee):

Xunwei Zhou (36 out of 43 patents)

Pitleong Wong (26 out of 40 patents)

Yuancheng Ren (20 out of 79 patents)

4. Siopang Chan (6 out of 6 patents)

5. Yang Lu (5 out of 11 patents)

6. Guoqiang Liu (5 out of 12 patents)

7. Aimin Xu (3 out of 4 patents)

8. Hao Long (3 out of 6 patents)

9. Feng Xu (3 out of 21 patents)

10. Xunjin Dou (3 out of 3 patents)

11. Junming Zhang (3 out of 46 patents)

12. Liyu Lin (2 out of 2 patents)

13. Xianghua Jiang (2 out of 4 patents)

14. Yue Ji (2 out of 3 patents)

15. Yingyan He (2 out of 4 patents)

Core Competencies:

Dropout Voltage Generation

Lateral Double-Diffused Transistor

Electrostatic Protection

Switching Power Supply

LED Driving Circuit

Current Zero-Crossing Detection

Active-Clamp Flyback Circuit

Synchronous Rectification

Power Device Driving

Dimming Circuit

Isolated Switch-Mode Power Supply

Integrated Circuit Design

40 patents: Sort by Forward Citations

1. 12489354 - Dropout voltage generation circuit, switching power supply and dropout voltage generation method (2025-12-02),

2. 12100741 - Lateral double-diffused transistor and manufacturing method thereof (2024-09-24),

3. 11652098 - Transistor structure for electrostatic protection and method for manufacturing same (2023-05-16),

4. 11563381 - Control method of switching circuit, control circuit of switching circuit, and switching circuit (2023-01-24),

5. 11463079 - Power transistor driving method, driving circuit and switching circuit (2022-10-04),

6. 11438979 - LED driving circuit and LED driving method (2022-09-06),

7. 11309796 - Control method of single live line charging circuit, control circuit of single live line charging circuit and single live line charging circuit (2022-04-19),

8. 11288431 - Method and system for establishing metal interconnection layer capacitance prediction model (2022-03-29),

9. 11218136 - Power transistor driving method, driving circuit and switching circuit (2022-01-04),

10. 11201553 - Control method and control circuit for switching power supply circuit, and switching power supply circuit (2021-12-14),

11. 11165355 - Clamping switch abnormality detection method, clamping switch abnormality detection circuit and switch circuit (2021-11-02),

12. 11152866 - Active clamping flyback circuit and control method thereof (2021-10-19),

13. 10951108 - Switching power supply controlling circuit and controlling method thereof (2021-03-16),

14. 10886913 - Drive method and drive circuit for power switch, and power supply system (2021-01-05),

15. 10886853 - Power device driving method and drive circuit for switching circuit, and the switching circuit (2021-01-05),

Joulwatt Technology (Hangzhou) Co., Ltd. is a leading provider of innovative renewable energy solutions. Specializing in solar energy technologies, Joulwatt offers a range of products and services including solar panels, inverters, and energy storage systems. With a commitment to sustainability and efficiency, Joulwatt is dedicated to empowering customers to make environmentally friendly choices while reducing their carbon footprint.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

40 Patents

#19 in Hangzhou

#714 in China

#16,565 in the World

Hangzhou, China

Joulwatt Technology (Hangzhou) Co., Ltd.

Forward Citations = 88

31 inventors:

Xunwei Zhou (36 out of 43 patents)

Pitleong Wong (26 out of 40 patents)

Yuancheng Ren (20 out of 79 patents)

4. Siopang Chan (6 out of 6 patents)

5. Yang Lu (5 out of 11 patents)

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