Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
PC

Pi-Fen Chen — 14 Patents

MEMediatek: 9 patents #307 of 2,888Top 15%
MCMacronix International Co.: 4 patents #351 of 1,241Top 30%
Hengshan, TW: #137 of 1,564 inventorsTop 9%
Overall (All Time): #332,869 of 4,157,543Top 9%
14 Patents All Time
Pi-Fen Chen has been granted 14 US patents while listed as an inventor at Mediatek. The first was granted in 2002 and the most recent in October 2025. Pi-Fen Chen ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Pi-Fen Chen in Hengshan, TW.

Patents per Year

Patents granted per year, 2002 to 2018Bar chart with a peak of 3 patents in 2003.peak 32002: 1 patents20022003: 3 patents20032008: 2 patents20082009: 1 patents20092010: 2 patents20102015: 1 patents20152016: 1 patents20162018: 2 patents2018

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12434078 Flying conveyor device 2025-10-07
9923390 Method and apparatus for performing charging port detection control Chieh-Wei Liao 2018-03-20
9859737 Method and apparatus for performing system power management in electronic device equipped with battery Chih-Yuan Hsu, Hung-I Wang 2018-01-02
9327321 Method and apparatus for performing system power management Chih-Yuan Hsu, Hung-I Wang 2016-05-03
9142982 Method and apparatus for performing charging port detection control Chieh-Wei Liao 2015-09-22
7816892 Battery charger for preventing charging currents from overshooting during mode transition and method thereof 2010-10-19
7663346 Battery charger for preventing both overshoot charging current and overcharged battery voltage during charging mode transition Ying WANG 2010-02-16
7609094 Input circuits and methods thereof 2009-10-27
7449865 Battery charger for preventing both overshoot charging currents and overcharged battery voltage during mode transitions and method thereof Ying WANG 2008-11-11
7405539 Battery charger for preventing charging currents from overshooting during mode transition and method thereof 2008-07-29
6642703 Peak detector and detecting method thereof Chi-Ming Chen 2003-11-04 $11,000
6611219 Oversampling data recovery apparatus and method Chu-hua Lee 2003-08-26 $31,000
6574576 Equalizer with auto-calibration and self-test Chi-Ming Chen 2003-06-03 $12,000
6472861 Peak detector Chi-Ming Chen 2002-10-29 $28,000