PC

Pi-Chao Chang

Overall (All Time): #415,318 of 4,157,543Top 10%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
10232522 Circular cutter 2019-03-19
9833030 Fabric folding machine 2017-12-05
9234306 Knitting loom 2016-01-12
D675259 Cutting mat 2013-01-29
8267752 Knife sharpening device of circular knife 2012-09-18
8020735 Detachable threader 2011-09-20
D633771 Craft knife for cutting circles 2011-03-08
D633361 Dual-use circular knife 2011-03-01
7204023 Rotary cutter 2007-04-17
7100295 Measuring device 2006-09-05
D523307 Scissors 2006-06-20
D419412 Scissors 2000-01-25