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Chao-Ying Hsien

Overall (All Time): #1,555,023 of 4,157,543Top 40%

3 Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
8254839	Signal transmitting device for drums	—	2012-08-28
7795519	Enhanced low-noise drum tympan	—	2010-09-14
7259317	Pickup and base structure of a drum head	—	2007-08-21