Li Yu

Person

Zhuhai, CN

People

Patents Grantslast 30 patents

Information Patent Grant
One-way valve, valve unit assembly, and ink cartridge using the same
- Patent number 7,475,972
- Issue date Jan 13, 2009
- Unicorn Image Products Co. Ltd. of Zhuhai
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Ink cartridge for a printer
- Patent number 7,246,891
- Issue date Jul 24, 2007
- Print-Rite Unicorn Image Products, Co., Ltd.
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
One-way valve, valve unit assembly, and ink cartridge using the same
- Patent number 6,935,730
- Issue date Aug 30, 2005
- Unicorn Image Products Co. Ltd. of Zhuhai
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Ink cartridge having bellows valve, ink filling method and apparatu...
- Patent number 6,929,357
- Issue date Aug 16, 2005
- Unicorn Image Products Co. Ltd.
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
One-way valve, valve unit assembly, and ink cartridge using the same
- Publication number 20050288874
- Publication date Dec 29, 2005
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Ink cartridge having bellows valve, ink filling method and apparatu...
- Publication number 20050243147
- Publication date Nov 3, 2005
- Unicorn Image Products Co. Ltd.
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Ink cartridge for a printer
- Publication number 20050068387
- Publication date Mar 31, 2005
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Ink cartridge having bellows valve, ink filling method and apparatu...
- Publication number 20030128257
- Publication date Jul 10, 2003
- Unicorn Image Products Co., Ltd.
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Ink cartridge having bellows valve, ink filling method and apparatu...
- Publication number 20030107626
- Publication date Jun 12, 2003
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
One-way valve, valve unit assembly, and ink cartridge using the same
- Publication number 20030048338
- Publication date Mar 13, 2003
- UNICORN IMAGE PRODUCTS CO. LTD. OF ZHUHAI
- Xiao Qingguo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Person

Patents Grantslast 30 patents

One-way valve, valve unit assembly, and ink cartridge using the same

Ink cartridge for a printer

One-way valve, valve unit assembly, and ink cartridge using the same

Ink cartridge having bellows valve, ink filling method and apparatu...

Patents Applicationslast 30 patents

One-way valve, valve unit assembly, and ink cartridge using the same

Ink cartridge having bellows valve, ink filling method and apparatu...

Ink cartridge for a printer

Ink cartridge having bellows valve, ink filling method and apparatu...

Ink cartridge having bellows valve, ink filling method and apparatu...

One-way valve, valve unit assembly, and ink cartridge using the same