Inventor

PI JIN BIAO

CN3 patents

⚠️ This page may combine multiple inventors who share the name “PI JIN BIAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WORLD WIDE STATIONERY MFG CO

2 patents

US7819602B2Oct 26, 2010

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO6 citations70

US7950866B2May 31, 2011

Ring binder mechanism with polymeric housing

WORLD WIDE STATIONERY MFG CO0 citations39

TO CHUN YUEN

1 patent

US9688091B2Jun 27, 2017

Ring binder mechanism

TO CHUN YUEN0 citations48