PC

Pi-Chao Chang

Overall (2011): #38,525 of 364,097Top 15%
3
Patents 2011

Issued Patents 2011

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
8020735 Detachable threader 2011-09-20
D633771 Craft knife for cutting circles 2011-03-08
D633361 Dual-use circular knife 2011-03-01