For the Inventor, By the Inventor

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Leadwell Cnc Machines Mfg., Corp.

USPTO Granted Patents = 2

Trademarks = 3

Forward Citations = 9

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4 inventors (with patents filed for the assignee):

Hong-sen Yan (1 out of 13 patents)

Pei-Chen Chao (1 out of 1 patent)

Chih-Wen Yiou (1 out of 1 patent)

4. Chien-Chun Chang (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5224916 - Door moving mechanism for a cutting machine (1993-07-06),

2. 5129140 - Cutter exchanging apparatus incorporated in a machine (1992-07-14),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,416 in Taipei

#4,103 in Taiwan

Leadwell Cnc Machines Mfg., Corp.

Forward Citations = 9

4 inventors:

Hong-sen Yan (1 out of 13 patents)

Pei-Chen Chao (1 out of 1 patent)

Chih-Wen Yiou (1 out of 1 patent)

4. Chien-Chun Chang (1 out of 1 patent)

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