DC

Dao-Pin Chang

Overall (All Time): #1,648,235 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5545560 Apparatus for composting and treating waste, particularly dung — 1996-08-13
4989592 Device to aid sexual potency — 1991-02-05
4854303 Hair circle for conjugal affection — 1989-08-08