Inventor
QINGGUO XIAO
CN5 patents
⚠️ This page may combine multiple inventors who share the name “QINGGUO XIAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNICORN IMAGE PRODUCTS CO LTD
3 patentsUS6935730B2Aug 30, 2005
One-way valve, valve unit assembly, and ink cartridge using the same
UNICORN IMAGE PRODUCTS CO LTD17 citations90
US6929357B2Aug 16, 2005
Ink cartridge having bellows valve, ink filling method and apparatus used thereof
UNICORN IMAGE PRODUCTS CO LTD32 citations90
US7475972B2Jan 13, 2009
One-way valve, valve unit assembly, and ink cartridge using the same
UNICORN IMAGE PRODUCTS CO LTD2 citations60