% Expired Patents = 66.7

Forward Citations = 3

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4 inventors (with patents filed for the assignee):

Dong Ho Chu (2 out of 37 patents)

Dong-chang Choi (2 out of 2 patents)

Jae-yong Lee (2 out of 2 patents)

4. Tea-Young Lee (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 8448692 - Mold for gravity casting and gravity casting method using the mold (2013-05-28),

2. 8267151 - Mold for gravity casting and gravity casting method using the mold (2012-09-18),

3. 5677003 - Method for coating diamond-like carbon on head drums of a video cassette (1997-10-14),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#1 in Haman-Gun

#2,793 in South Korea

Haman-Gun, South Korea

Samshin Precision Co., Ltd.

Forward Citations = 3

4 inventors:

Dong Ho Chu (2 out of 37 patents)

Dong-chang Choi (2 out of 2 patents)

Jae-yong Lee (2 out of 2 patents)

4. Tea-Young Lee (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Samshin Precision Co., Ltd.. Retrieved from https://idiyas.com/company/samshin-precision-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]