Forward Citations = 284

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5 inventors (with patents filed for the assignee):

Raymond Wai Hang Chu (13 out of 13 patents)

Raymond Wai Chu (4 out of 5 patents)

Kin Yu Wong (2 out of 17 patents)

4. Hin Ming Lam (1 out of 2 patents)

5. Thomas Ka Wa Ching (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 6861605 - Electrical slide switch (2005-03-01),

2. 6794594 - Power tool trigger assembly (2004-09-21),

3. 6784390 - Electrical switch (2004-08-31),

4. 6774509 - Electrical switch assembly (2004-08-10),

5. 6765317 - Power supply module for electrical power tools (2004-07-20),

6. 6762666 - Toroidal core for a toroid (2004-07-13),

7. 6759608 - Electrical switch (2004-07-06),

8. 6741051 - Power tool trigger control (2004-05-25),

9. 6710277 - Electrical switch (2004-03-23),

10. 6624991 - Circuit breaker (2003-09-23),

11. 6605787 - Electrical switch (2003-08-12),

12. 6590175 - Illuminated rocker switch with resistor (2003-07-08),

13. 6483063 - Electrical switch including a metal heat sink (2002-11-19),

14. 6388408 - Motor current sensing in electric power tools (2002-05-14),

15. 6340926 - Power plug with circuit breaker (2002-01-22),

Company Overview

Defond Manufacturing Limited is a Hong Kong-based company specializing in the design and production of a wide range of electronic components and assemblies. The organization focuses on various sectors, including automotive, consumer electronics, and industrial applications, providing innovative solutions that enhance functionality and reliability. With a commitment to quality and technological advancement, Defond plays a significant role in the global supply chain, catering to diverse market needs through its extensive expertise in manufacturing and engineering.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

21 Patents

#163 in Hong Kong

#1,392 in China

#29,928 in the World

Hong Kong, China

Defond Manufacturing Limited

Forward Citations = 284

5 inventors:

Raymond Wai Hang Chu (13 out of 13 patents)

Raymond Wai Chu (4 out of 5 patents)

Kin Yu Wong (2 out of 17 patents)

4. Hin Ming Lam (1 out of 2 patents)

5. Thomas Ka Wa Ching (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Defond Manufacturing Limited. Retrieved from https://idiyas.com/company/defond-manufacturing

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

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]