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Tsun Ding Chen

Overall (All Time): #2,264,734 of 4,157,543Top 55%

2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5836584	Spherical puzzle toy	—	1998-11-17
5816571	Spherical puzzle toy	—	1998-10-06