Chul H. Ahn

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Seoul, KR

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Patents Grantslast 30 patents

Information Patent Grant
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- Patent number 5,138,487
- Issue date Aug 11, 1992
- Han; Seung H.
- Chul H. Ahn
- G02 - OPTICS
Information Patent Grant
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- Patent number 4,892,399
- Issue date Jan 9, 1990
- Chul H. Ahn
- G02 - OPTICS