% Expired Patents = 62.5

Forward Citations = 9

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2 inventors (with patents filed for the assignee):

Shih-Fang Chen (7 out of 15 patents)

Shin-Fang Chen (1 out of 1 patent)

8 patents: Sort by Forward Citations

1. 6932009 - Thread tension adjustment device of multi-needle sewing machine (2005-08-23),

2. 6904853 - Take-up cam phase adjustment structure of looper thread take-up apparatus of a sewing machine (2005-06-14),

3. 6712015 - Oblique thread-guiding link of a sewing machine (2004-03-30),

4. 6694903 - Knife track adjustment structure of thread cutter of sewing machine (2004-02-24),

5. 6691630 - Looper thread take-up apparatus of a sewing machine (2004-02-17),

6. 6668739 - Sewing machine (2003-12-30),

7. 6666158 - Looper thread take-up apparatus externally added to outer end of lower driving shaft of a sewing machine (2003-12-23),

8. 6263812 - Looper thread take-up structure of sewing machine capable of very easily clearing up tangling thread (2001-07-24),

Company Overview

Ching Chi Machine Co., Ltd. is a leading manufacturer of precision machinery based in Taiwan. With over 30 years of experience, we specialize in producing high-quality machinery for a wide range of industries including automotive, electronics, and medical. Our innovative solutions and dedication to excellence have earned us a solid reputation in the industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

8 Patents

#507 in Taipei

#1,702 in Taiwan

Taipei, Taiwan

Ching Chi Machine Co., Ltd.

Forward Citations = 9

2 inventors:

Shih-Fang Chen (7 out of 15 patents)

Shin-Fang Chen (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ching Chi Machine Co., Ltd.. Retrieved from https://idiyas.com/company/ching-chi-machine-company

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]