Yen-Fu Liu has been granted 14 US patents while listed as an inventor at Ledtech Electronics . The first was granted in 2006 and the most recent in June 2014. Yen-Fu Liu ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Yen-Fu Liu in Daxi District, TW.
Patents per Year Patents granted per year, 2006 to 2014 Bar chart with a peak of 3 patents in 2008. peak 3 2006: 1 patents 2006 2008: 3 patents 2008 2009: 3 patents 2009 2010: 3 patents 2010 2011: 2 patents 2011 2012: 1 patents 2012 2014: 1 patents 2014
Issued Patents All Time
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Showing 1–14 of 14 patents
Patent # Title Co-Inventors Date
8760411 Method for determining the number of fingers on a sensing device Jao-Ching Lin , Linabel Chu , John Shen 2014-06-24
8164575 Method for identifying a single tap, double taps and a drag and a controller for a touch device employing the method Jao-Ching Lin , Lin-Abel Chu , Chung-Yi Shen 2012-04-24
8045706 System of efficiently implementing secure hash algorithm (SHA-1) in digital hardware that accomplishes optimal computation speed using minimal hardware resources — 2011-10-25
7976190 Custom assembly light-emitting module using plugs and jacks for obtaining vertical electrical connections Che-Cheng Shen , Ching-Kun Chang , Kuo-Hsin Yeh 2011-07-12
7806557 Lighting unit, receptacle unit, and assembly thereof Chien-Hung Tsai , Hsuan-Hui Chen 2010-10-05
7682039 Extensible light shade Shu Shoung Kuo , Yu-Yang Liu 2010-03-23
7642479 Touch pad structure Jao-Ching Lin , Chung-Yi Shen , Lin-Abel Chu 2010-01-05
7600907 LED lighting device Hung-Hsin Lee 2009-10-13
7570759 System and method for secure encryption — 2009-08-04
7556396 Lamp assembly Shu-Hsiung Kuo , Yu-Yang Liu 2009-07-07
D583496 Lamp Shu Shoung Kuo , Yu-Yang Liu 2008-12-23
D578248 LED lamp Hung-Hsin Lee 2008-10-07
7346816 Method and system for testing memory using hash algorithm — 2008-03-18
7020570 Accelerated test method and system — 2006-03-28