John Canfield

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Union City, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Integrated ambient light sensor and distance sensor
- Patent number 8,705,015
- Issue date Apr 22, 2014
- Eminent Electronic Technology Corp.
- Tom Chang
- G01 - MEASURING TESTING
Information Patent Grant
Integrated ambient light sensor and distance sensor
- Patent number 8,125,619
- Issue date Feb 28, 2012
- Eminent Electronic Technology Corp.
- Tom Chang
- G01 - MEASURING TESTING
Information Patent Grant
Light detection circuit for ambient light and proximity sensor
- Patent number 7,960,699
- Issue date Jun 14, 2011
- Eminent Electronic Technology Corp.
- Tom Chang
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Integrated Ambient Light Sensor and Distance Sensor
- Publication number 20120153153
- Publication date Jun 21, 2012
- EMINENT ELECTRONIC TECHNOLOGY CORP.
- Tom Chang
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
LIGHT DETECTION CIRCUIT FOR AMBIENT LIGHT AND PROXIMITY SENSOR
- Publication number 20110266446
- Publication date Nov 3, 2011
- EMINENT ELECTRONIC TECHNOLOGY CORP.
- Tom Chang
- G01 - MEASURING TESTING
Information Patent Application
Optical touch panel
- Publication number 20100295821
- Publication date Nov 25, 2010
- Tom Chang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Light detection circuit for ambient light and proximity sensor
- Publication number 20100102230
- Publication date Apr 29, 2010
- Tom Chang
- G01 - MEASURING TESTING
Information Patent Application
Integrated ambient light sensor and distance sensor
- Publication number 20090027652
- Publication date Jan 29, 2009
- Tom Chang
- H03 - BASIC ELECTRONIC CIRCUITRY