Trademarks = 1

Forward Citations = 7

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4 inventors (with patents filed for the assignee):

Tzu-Chun Chen (5 out of 6 patents)

Yung-Shun Chen (1 out of 30 patents)

Tien Sung Chen (1 out of 2 patents)

4. Yu Wen Chen (1 out of 2 patents)

6 patents: Sort by Forward Citations

1. 12479071 - Hand tool and method for manufacturing the same (2025-11-25),

2. 11292107 - Engagement structure of socket wrench (2022-04-05),

3. 10183385 - Locking structure for hand tool (2019-01-22),

4. 9522458 - Clamping structure for open end wrench (2016-12-20),

5. 9221157 - Angle controlling device for a wrench (2015-12-29),

6. 9073184 - Controlling structure for a unidirectional ratchet wrench (2015-07-07),

Yung Fong Tools Co., Ltd. is a leading manufacturer and supplier of high-quality industrial tools and equipment. With over 20 years of experience in the industry, we are known for our commitment to excellence and customer satisfaction. Our product range includes cutting tools, measuring tools, hand tools, power tools, and more. We strive to provide innovative solutions to meet the needs of our clients worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

6 Patents

#222 in Taichung

#1,997 in Taiwan

Taichung, Taiwan

Yung Fong Tools Co., Ltd.

Forward Citations = 7

4 inventors:

Tzu-Chun Chen (5 out of 6 patents)

Yung-Shun Chen (1 out of 30 patents)

Tien Sung Chen (1 out of 2 patents)

4. Yu Wen Chen (1 out of 2 patents)

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