Wen-An Yeh

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Feng-Shan City, Kaohsiung Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Planetary-type lapping device for finish-grinding the valve seat of...
- Patent number 5,259,144
- Issue date Nov 9, 1993
- Wen-An Yeh
- B24 - GRINDING POLISHING