Qingguo; Xiao

Patent Applications and Registrations

Patent applications and USPTO patent grants for Qingguo; Xiao.The latest application filed is for "one-way valve, valve unit assembly, and ink cartridge using the same".

Company Profile

0.5.7

Qingguo; Xiao - Zhuhai CN
Qingguo; Xiao - Guangdong CN

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
One-way valve, valve unit assembly, and ink cartridge using the same Grant 7,475,972 - Qingguo , et al. January 13, 2	2009-01-13
Ink cartridge for a printer Grant 7,246,891 - Qingguo , et al. July 24, 2	2007-07-24
Device for continuously supplying ink under constant pressure Grant 7,175,264 - Qingguo , et al. February 13, 2	2007-02-13
One-way valve, valve unit assembly, and ink cartridge using the same App 20050288874 - Qingguo, Xiao ; et al.	2005-12-29
Ink cartridge having bellows valve, ink filling method and apparatus used thereof App 20050243147 - Qingguo, Xiao ; et al.	2005-11-03
One-way valve, valve unit assembly, and ink cartridge using the same Grant 6,935,730 - Qingguo , et al. August 30, 2	2005-08-30
Ink cartridge having bellows valve, ink filling method and apparatus used thereof Grant 6,929,357 - Qingguo , et al. August 16, 2	2005-08-16
Device for continuously supplying ink under constant pressure App 20050174408 - Qingguo, Xiao ; et al.	2005-08-11
Ink cartridge for a printer App 20050068387 - Qingguo, Xiao ; et al.	2005-03-31
Ink cartridge having bellows valve, ink filling method and apparatus used thereof App 20030128257 - Qingguo, Xiao ; et al.	2003-07-10
Ink cartridge having bellows valve, ink filling method and apparatus used thereof App 20030107626 - Qingguo, Xiao ; et al.	2003-06-12
One-way valve, valve unit assembly, and ink cartridge using the same App 20030048338 - Qingguo, Xiao ; et al.	2003-03-13

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