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USPTO Patent Rankings Data through Dec 31, 2025
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Chia-Jun Chang — 21 Patents

RSRealtek Semiconductor: 20 patents #49 of 1,741Top 3%
Hsinchu, TW: #1,117 of 13,380 inventorsTop 9%
Overall (All Time): #201,324 of 4,157,543Top 5%
21 Patents All Time
Chia-Jun Chang has been granted 21 US patents while listed as an inventor at Realtek Semiconductor. The first was granted in 2006 and the most recent in September 2025. Chia-Jun Chang ranks #201,324 of 4,157,543 US inventors in our database (top 4.8%). Patent records list Chia-Jun Chang in Hsinchu, TW.

Patents per Year

Patents granted per year, 2006 to 2025Bar chart with a peak of 4 patents in 2025.peak 42006: 3 patents20062007: 1 patents2011: 1 patents20112012: 1 patents2013: 1 patents20132014: 3 patents2019: 1 patents20192021: 1 patents2022: 1 patents20222023: 1 patents2024: 3 patents20242025: 4 patents2025

Issued Patents All Time

Showing 1–21 of 21 patents

Patent #TitleCo-InventorsDate
12413211 Frequency mixing circuit with multi-transistor architecture Yi-Ching Wu 2025-09-09
12388422 Resistive attenuator and method for improving linearity of resistive attenuator Yi-Ching Wu 2025-08-12
12334887 Variable gain amplifier circuit and method having linearity compensation mechanism Yang Chang 2025-06-17
12199807 Wireless transceiver having in-phase quadrature-phase calibration function Kuan-Yu Shih 2025-01-14
12119802 Radio frequency transceiver device Chia-Yi Lee, Kuan-Yu Shih 2024-10-15
11990269 Inductor device that can resist external interference and adjust inductance value and quality factor of inductor Yang Chang, Chia-Yi Lee 2024-05-21
11863127 Amplifier device Yang Chang, Kuan-Yu Shih, Ka-Un Chan 2024-01-02
11588612 Communication chip Jon-Jin Chen, Ka-Un Chan, Yi-Ching Wu 2023-02-21
11283412 Low noise amplifier circuit having multiple gains Chia-Yi Lee, Ping-Hsuan Tsai, Ka-Un Chan 2022-03-22
10938438 Radio-frequency circuit Ka-Un Chan, Chih-Lung Chen, Po-Chih Wang 2021-03-02
10312863 Amplifying circuit and associated receiver Ka-Un Chan 2019-06-04
8922450 Signal converting circuit capable of reducing/avoiding signal leakage and related signal converting method Hsien-Ku Chen, Ka-Un Chan, Ying-Hsi Lin 2014-12-30
8860507 Amplifier with gain circuit coupeld to primary coil of transformer Hsien-Ku Chen, Ka-Un Chan, Ying-Hsi Lin 2014-10-14
8816771 Signal amplifying circuit with reduced output signal noise by introducing coupling effect and related method thereof Hsien-Ku Chen, Ka-Un Chan, Ying-Hsi Lin 2014-08-26
8472894 Signal transmitting/receiving circuit including an impedance matching circuit Po-Chih Wang 2013-06-25
8095101 Receiving device and related method for calibrating DC offset Pei-Ju Chiu, Chao-Cheng Lee 2012-01-10
7984861 Hydrant apparatus and water discharging method — 2011-07-26
7190173 Impedance calibration circuit and method thereof Tzung-Ming Chen 2007-03-13
7106131 Amplifying circuit Chao-Cheng Lee 2006-09-12
7023263 Low pass filter Chao-Cheng Lee 2006-04-04
7015730 Mix-type sample and hold circuit of receiving end and receiving method thereof Chao-Cheng Lee 2006-03-21

Frequent Collaborators

Ka-Un Chan8 shared
Chao-Cheng Lee4 shared
Yang Chang3 shared
Kuan-Yu Shih3 shared
Ying-Hsi Lin3 shared
Chia-Yi Lee3 shared

Nearby-Ranked Inventors

Subhash Sankuratripati21
Brian Riordan21
Woongki Min21
Jeremy Cailleteau21
Shigeru Chiba21
Cecilia Carbonelli21
Pin-Wen Chen21
Michael Danz21
Paul Kolen21