ZZ

Ze Yu Zhang

WC World Wide Stationery Mfg. Co.: 2 patents #2 of 9Top 25%
📍 Dongxing District, CN: #1 of 1 inventorsTop 100%
Overall (2011): #54,890 of 364,097Top 20%
2
Patents 2011

Issued Patents 2011

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8052343 Ring binder mechanism Wing Yiu Ng 2011-11-08
8047737 Ring binder mechanism Jn Biao Pi, Chun Yuen To 2011-11-01