Louis H. Liang

Person

Los Altos, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
First-order authentication system
- Patent number 6,603,871
- Issue date Aug 5, 2003
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
First-order authentication system
- Patent number 6,470,093
- Issue date Oct 22, 2002
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Apparatus and methods for authentication using partially fluorescen...
- Patent number 6,373,965
- Issue date Apr 16, 2002
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Apparatus and methods for fluorescent imaging and optical character...
- Patent number 5,867,586
- Issue date Feb 2, 1999
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Apparatus and methods for fluorescent imaging and optical character...
- Patent number 5,719,948
- Issue date Feb 17, 1998
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
System for authenticating printed or reproduced documents
- Patent number 5,714,291
- Issue date Feb 3, 1998
- Marinello; Daniel
- Daniel Marinello
- G07 - CHECKING-DEVICES
Information Patent Grant
Fluorescence authentication reader with coaxial optics
- Patent number 5,666,417
- Issue date Sep 9, 1997
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Tamper resistant system using ultraviolet fluorescent chemicals
- Patent number 5,605,738
- Issue date Feb 25, 1997
- Angstrom Technologies, Inc.
- William G. McGinness
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Fluorescence authentication reader with coaxial optics
- Patent number 5,574,790
- Issue date Nov 12, 1996
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Methods and apparatus for authenticating data storage articles
- Patent number 5,548,106
- Issue date Aug 20, 1996
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Methods and apparatus for test and burn-in of integrated circuit de...
- Patent number 5,532,612
- Issue date Jul 2, 1996
- Louis H. Liang
- G01 - MEASURING TESTING
Information Patent Grant
Authentication system and method
- Patent number 5,418,855
- Issue date May 23, 1995
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Apparatus and method for calibration of fluorescence detectors
- Patent number 5,414,258
- Issue date May 9, 1995
- Angstrom Technologies, Inc.
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Portable authentication fluorescence scanner employing single and m...
- Publication number 20030080193
- Publication date May 1, 2003
- William J. Ryan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
First-order authentication system
- Publication number 20010054644
- Publication date Dec 27, 2001
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
First-order authentication system
- Publication number 20010014169
- Publication date Aug 16, 2001
- Louis H. Liang
- G06 - COMPUTING CALCULATING COUNTING

Louis H. Liang

Person

Patents Grantslast 30 patents

First-order authentication system

First-order authentication system

Apparatus and methods for authentication using partially fluorescen...

Apparatus and methods for fluorescent imaging and optical character...

Apparatus and methods for fluorescent imaging and optical character...

System for authenticating printed or reproduced documents

Fluorescence authentication reader with coaxial optics

Tamper resistant system using ultraviolet fluorescent chemicals

Fluorescence authentication reader with coaxial optics

Methods and apparatus for authenticating data storage articles

Methods and apparatus for test and burn-in of integrated circuit de...

Authentication system and method

Apparatus and method for calibration of fluorescence detectors

Patents Applicationslast 30 patents

Portable authentication fluorescence scanner employing single and m...

First-order authentication system

First-order authentication system