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For the Inventor, By the Inventor

Seoul, South Korea

Chang Sik Yoo

USPTO Granted Patents = 21 

Average Co-Inventor Count = 2.9

ph-index = 2

Forward Citations = 22(Granted Patents)


Location History:

  • Suwon, KR (2003)
  • Seoul, KR (2011 - 2022)

Company Filing History:

goldMedal12 out of 1,109 
 
Industry-university Cooperation Foundation Hanyang University
 patents
silverMedal7 out of 131,214 
 
Samsung Electronics Co., Ltd.
 patents
bronzeMedal5 out of 7,574 
 
Samsung Electro-mechanics Co., Ltd.
 patents
4. 5 out of 140 
 
University of Seoul Industry Cooperation Foundation
 patents
5. 2 out of 10,938 
 
Skhynix Inc.
 patents
6. 1 out of 6,228 
 
Hynix Semiconductor Inc.
 patents
where one patent can have more than one assignee

Years Active: 2003-2025

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21 patents (USPTO):Explore Patents
1. 12418445 - Low power PAM-4 output transmitter (2025-09-16),
2. 12143107 - Multiplexer (2024-11-12),
3. 11502714 - High-speed data transmitting/receiving system and method of removing simultaneous switching noise and inter-symbol interference (2022-11-15),
4. 10992412 - Transmitter for cancelling simultaneous switching noise and data transmission method in the same (2021-04-27),
5. 10924204 - Signal transmission device and method, and signal reception device (2021-02-16),
6. 10382046 - Digital phase locked loop (2019-08-13),
7. 10320400 - Phase-locked loop with high bandwidth using rising edge and falling edge of signal (2019-06-11),
8. 10205353 - Apparatus and method for charging control in wireless charging system (2019-02-12),
9. 9793740 - Apparatus and method for charge control in wireless charging system (2017-10-17),
10. 9712077 - Active rectifier and circuit for compensating for reverse current leakage using time delay scheme for zero reverse leakage current (2017-07-18),
11. 9437362 - Apparatus and method for wireless power reception (2016-09-06),
12. 9431889 - Active rectifier with delay locked loop to compensate for reverse current leakage and wireless power receiving apparatus including active rectifier with delay locked loop to compensate for reverse current leakage (2016-08-30),
13. 9270165 - Phase shift circuit and power factor correction circuit including the same (2016-02-23),
14. 9252655 - Phase shift circuit and power factor correction circuit including the same (2016-02-02),
15. 9225235 - Power factor correction circuit (2015-12-29),

Title: Chang Sik Yoo - Pioneering Inventor from Seoul

Introduction: Chang Sik Yoo is a distinguished inventor hailing from Seoul, South Korea, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Chang Sik Yoo holds several patents in various technological domains, showcasing his continuous commitment to pushing the boundaries of innovation.

Career Highlights: With a career spanning over two decades, Chang Sik Yoo has consistently demonstrated his prowess in developing cutting-edge solutions that have revolutionized the industry.

Collaborations: Throughout his career, Chang Sik Yoo has collaborated with leading tech companies, research institutions, and universities, fostering a culture of innovation and knowledge sharing.

Conclusion: Chang Sik Yoo's relentless passion for innovation and his remarkable contributions to the technological landscape make him a true pioneer in the field of inventors.

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