29. 이상국, Ngan Hoang, Guillaume Thenaisie, 이정선, “Regulating power method for stand-alone transmitter and stand-alone receivers in wireless power transfer”, US App. No. 15014052, Date, 2016.02.03.

28. 이상국, 기욤 테네시, “리튬 기반 배터리의 진보적인 동적 상태 엔트로피 추출법”, US App. No. 15044400, Date, 2016.02.16.

27. 이상국, 기욤 테네시, "Thermodynamics-aware lithium battery smart charging algorithm", App no. 15044213,, date 2016.02.16

26. Sang-Gug Lee, Yuna Shim, "APPARATUS FOR DUAL BAND FOR RECEIVING IN WIRELESS COMMUNICATION SYSTEM", App no. 14/179,210, date 2014.02.12

25. Sang Gug Lee, Ohyong JUNG, Seungjin Kim, Seok Kyun Han, "Temperature sensor and temperature measurement method thereof", App no. 13/753,650, 2013.01.30

24. Mi-Hyun Son, Yong-Hoon Kim, Byung-tae Yoon, Jong-Wook Zeong, Dong-geun Lee, Jeong-seon Lee, Sang-Gug Lee, "Beamforming apparatus and method in mobile communication system", App no. 13/727,377, 2012.12.26

23. Sang-Gug Lee, Yuna SHIM, "Signal converting apparatus and receiving apparatus for supporting concurrent dual bands in wireless communication system", App no. 13/423,685, 2012.03.16

22. Sang-Gug Lee, Seungjin Kim, "Frequency synthesizer, method of generating output frequency thereof and method of correcting conversion gain thereof", App no. 13/250,037, 2011.09.30

21. Lee Young Jae ,Lee Sang Sung ,Lee Sang-Gug, "DC offset cancellation circuit", App no. 12/950193, 2010.11.19

20. Yeong-Shin Jang, Sang-Gung Lee, "Digital feedforward sigma-delta modulator in analog to digital converter and modulation method, App no. 12/841,533, 2010.06.14

19. Jong-Phil Hong, Sang-Gug Lee,"Gm-boosted differential drain-to-source feedback colpitts voltage controlled oscillator", App no. 12690136, 2010.01.20

18. Jong-Phil Hong, Sang-Gug Lee, and etc,"Low voltage frequency synthesizer using boosting method for power supply voltage of charge pump,Application No. 12/561910,2009-09-14, filed for US Patent..

17. Choong Yul Cha, Hoon Tae Kim, Sang Gug Lee, " Low noise amplifier wide band", App. No, 2009-352380, 2009.06.12

16. Dae Young Yun, Seok kyun Han, Sang Gug Lee," Super regenerative receiver and method of saving power of the same", App. No, 2008-333974, 2008.12.12

15. In Young Lee, Seok Ju Yun, Sang Gug Lee, Seong Hoon Choi, Chang Sun Kim, " Switch, negative reistance cell, and differential voltage controlled oscillator using the same", App. No, 2008-257920, 2008.10.24

14. Hoang Duong Quoc, E.J. Kim, S.G. Lee, J.S. Lee, B.R. Choi ,H.B. Kim,"Variable Gain Amplifier Having Wide Gain Variation and Wide bandwidth", App. No. 2008-210670, 2008.09.15

13. Yun Ah Sim, Ja Won Seo, " Transimpedance amplifier circuit for optical receiver in optical communication system", App No. 2008-193984, 2008.08.19

12. H.Y.Kang, H.K.Choi, Le Qyan, Kwoun Yool, B.T. Kim, S.G.Lee, "Digital automatic gain control apparatus and method in burst mode optical receiver", App No.2008-544250, 2008.06.05

11. D.Q hoang Sang-Gug Lee, T.J Park,“Variable gain amplifier with wide gain variation and wide bandwidth”, App. No, 11/775,105, 2007.07.09

10. Shim,Yuna, Yoon Dae Young, Lee Sagn-Gug," Method of generating muti-channel oscillation frequencies", App No.2007-773261,2007.07.03

9. Jeong-hoon kim, Nam-Jin Oh, Sang-Gug Lee," Quadrature voltage-controlled oscillator", App. No.,2007-733042, 2007.04.09

8. Cha, Choong-Yul,Kim, Hoon-tae, Lee, sang-Gug, “Low noise amplifier for ultra wide band”, App.No., 11/3336,788, 2006.01.23

7. Lee, Han-seung,Duong, Hoang Quoc, Lee, Sang-Gug, " Exponential funtion generator", App.No.,11/338,747,2006.1.25

6. 강호용, 최현균, 레꿘, 권율, 김봉태, 이상국, “버스트 모드 트랜스 임피던스 증폭기의 디지털 자동이득 제어 및 내부 리셋 발생 방법", 출원번호 PCT/KR2006/005213. 2006.12.05

5. Kang, Min-suk, Phan Tuan-anh, Lee, Sang-Gug, " Apparatus and method generating multi RF tone signals in UWB Communication system",App.No.,2005-136363. 2005.05.25

4. Kang, Dong Kyun, Lee, Sang-Gug, " Voltage controlled oscillator using complementary transistors",App No., 2004-941585,2004.09.15

3. Quan Le, Yong-Hun Oh, Sang-Gug Lee, "Burst mode optical receiver",App.No., 2004-810203,2004.03.26

2. Yong-Hun Oh, Quan Le, Sang-Gug Lee,"Apparatus for compensating for characteristics of laser diode and optical transmitter including the apparatus", App .No.,2004-810202, 2004.09.30,

1. Seo, Ja Won, Sang-Gug Lee, "Burst mode optical receiver",App.No.,2003-696142,2003.10.28