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Forward Citations = 281

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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),

Defond Manufacturing Limited is a global manufacturer and supplier of switch and electro-mechanical products. With over 40 years of experience, Defond has established a strong presence in various industries, including automotive, home appliance, industrial equipment, and more. The company is committed to providing high-quality and innovative solutions that meet the unique needs of their customers. With a customer-centric approach, Defond strives to deliver excellent products and services while maintaining sustainability and ethical practices.

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USPTO Data Jan 1 1976 - Jan 20 2026

21 Patents

#156 in Hong Kong

#1,259 in China

#29,122 in the World

Hong Kong, China

Defond Manufacturing Limited