Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Chii-How Chang — 11 Patents

DEDelta Electronics: 11 patents #134 of 2,746Top 5%
Taoyuan, TW: #602 of 5,438 inventorsTop 15%
Overall (All Time): #435,149 of 4,157,543Top 15%
11 Patents All Time
Chii-How Chang has been granted 11 US patents while listed as an inventor at Delta Electronics. The first was granted in 2005 and the most recent in November 2018. Chii-How Chang ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Chii-How Chang in Taoyuan, TW.

Patents per Year

Patents granted per year, 2005 to 2018Bar chart with a peak of 2 patents in 2005.peak 22005: 2 patents20052007: 1 patents20072008: 1 patents20082009: 1 patents20092010: 1 patents20102012: 1 patents20122013: 1 patents20132014: 2 patents20142018: 1 patents2018

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
10119561 Latch module and detachable assembling structure using same Yao Peng 2018-11-06
8789378 Magnetic flux detection apparatus Shao-Hsiung Chang 2014-07-29
8646280 Heat-power conversion magnetism devices Shao-Hsiung Chang 2014-02-11
8453466 Heat-power conversion magnetism device and system for converting energy thereby Shao-Hsiung Chang 2013-06-04
8107210 Magnetic actuator system and control method thereof Sean Chang 2012-01-31
7665914 Iris diaphragm actuator, magnetic position sensing structure and arrangement method thereof 2010-02-23
7594239 Magnetic actuator Sean Chang 2009-09-22
7455466 Magnetic actuator for adjusting an iris diaphragm in an optical device Sean Chang 2008-11-25
7239052 Magnetic actuators Sean Chang 2007-07-03
6973228 Wavelength stabilizing apparatus and control method Sean Chang 2005-12-06
6956986 Method for eliminating the noise of optical switch 2005-10-18