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Chao-Huei Chien

Overall (All Time): #2,341,235 of 4,157,543Top 60%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4646732 Circulative respiratory mask — 1987-03-03
4549542 Multiple-effect respirator — 1985-10-29

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