Donald Pakman Liu

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Las Vegas, NV, US

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Patents Grantslast 30 patents

Information Patent Grant
Document validator with locking cassette
- Patent number 7,222,712
- Issue date May 29, 2007
- Valtech International, LLC
- Donald Pakman Liu
- G07 - CHECKING-DEVICES
Information Patent Grant
Alignment disk for document validator
- Patent number 7,014,189
- Issue date Mar 21, 2006
- Valtech International, LLC
- Donald Pakman Liu
- G07 - CHECKING-DEVICES

Patents Applicationslast 30 patents

Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING A VENDING MACHINE
- Publication number 20090187273
- Publication date Jul 23, 2009
- Donald Liu
- G07 - CHECKING-DEVICES
Information Patent Application
Sleep circuit for document validator
- Publication number 20050173220
- Publication date Aug 11, 2005
- Donald Pakman Liu
- G07 - CHECKING-DEVICES
Information Patent Application
Document validator with interface module
- Publication number 20040211708
- Publication date Oct 28, 2004
- Donald Pakman Liu
- G07 - CHECKING-DEVICES
Information Patent Application
Document validator with locking cassette
- Publication number 20040211644
- Publication date Oct 28, 2004
- Donald Pakman Liu
- G07 - CHECKING-DEVICES
Information Patent Application
Alignment disk for document validator
- Publication number 20040211839
- Publication date Oct 28, 2004
- Donald Pakman Liu
- G07 - CHECKING-DEVICES
Information Patent Application
Currency validator
- Publication number 20020109830
- Publication date Aug 15, 2002
- Donald Pakman Liu
- G07 - CHECKING-DEVICES