KC

Kei Cheng

HU Hong Kong Polytechnic University: 1 patents #243 of 733Top 35%
WC World Wide Stationery Mfg. Co.: 1 patents #17 of 21Top 85%
Overall (All Time): #2,018,681 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9511617 Ring binder mechanism — 2016-12-06
6190497 Ultrasonic transducer Helen Lai Wa Chan, Siu Wing Or, Chung Loong Choy 2001-02-20