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Sun J. Kim is an experienced, highly qualified patent practitioner, who provides insightful, practical, and business-oriented service to his clients. Sun helps his clients devise patent strategies, grow their portfolios, and improve their intellectual property processes. Prior to joining Dilworth IP, Sun was a patent agent at a patent law firm in Long Island, where he drafted and prosecuted hundreds of patent applications in a variety of technical areas including semiconductors, social networks, machine learning, cloud computing, medical devices, optics, RFID, wireless networks, and holograms. Prior to working as a patent agent, Sun worked for the Korean Intellectual and Property Office (KIPO) as a patent examiner for over 3 years. In addition to his legal acumen, Sun possess a Ph.D. degree in Electrical Engineering and more than 4 years of research experience at Telecommunications Technology Association (TTA) in South Korea and Technical University of Denmark (DTU) in Denmark. This background gives him a strong foundation of knowledge and experience across many areas of telecommunication technologies including optics, fiber-optic communications, lasers, computer networks, 3G/4G cellular wireless networks.


  • Prepared, filed, and prosecuted more than 400 patent applications, including more than 40 new patent applications within the past four years
  • Performed patent examination on more than 300 patent applications at KIPO for more than 3 years
  • Prepared PCT search reports and written opinions at KIPO
  • Conducted validation and certification test on 3G/4G wireless standard-based communication equipment devices and terminals
  • Participated in an EU research project on optical label switching: investigated optimal modulation formation using experimental and computer simulation methodologies
  • Inventor on 5 patents issued at and U.S. and South Korea
  • Author on 48 internationally published journal and conference papers

Technology Areas

Sun’s field of technology includes electronic circuits and systems, wireless networks, cellular networks, fiber-optic communications, internet applications, fiber-optic devices, lasers, computer sciences, clouding computing, semiconductors, display devices, medical devices, machine-learning systems, holograms, and social networks.

Selected Papers

  • -J. Kim, T.-Y. Kim, C. S. Park, and C.-S. Park, “10-Gb/s temporally coded optical CDMA system using bipolar modulation/balanced detection,” IEEE Photon. Technology Lett., vol. 17, no. 2, pp. 510-512, 2005
  • -J. Kim, T.-Y. Kim, C. S. Park, C.-S. Park, and Y. Y. Chun, “All-optical differential detection for suppressing multiple-access interference in coherent time-addressed optical CDMA systems,” Opt. Express 12, 1848-1856, 2004
  • Idelfonso Tafur Monroy, Sun-Jong Kim, Christophe Peucheret, Palle Jeppessen, “Wavelength shift keying modulation up to 35 Gb/s with wavelength tone reuse to multiplex two 40 Gb/s DPSK signals”, Optical Fiber Technology, Vol. 13, Issue 1, pp. 13-17, 2007
  • -J. Kim, T. J. Eom, B. H. Lee, and C.-S. Park, “Optical temporal encoding/decoding of short pulses using cascaded long-period fiber gratings,” Opt. Express 11, 3034-3040, 2003
  • Tae-Young Kim, Sun-Jong Kim, Chang-Soo Park, “Gain-saturated SOA-based optical power booster for spectrum-sliced incoherent light,” Microwave and Optical Technology Letter, 49, paper 12, pp. 3038-3040, 2007
  • -J. Kim, T. J. Eom, T.-Y. Kim, B. H. Lee, C. S. Park, and C.-S. Park, “Demonstration of two-user, 10 Gb/s CDMA system implemented by using cascaded long-period fiber gratings formed in dispersion compensating fiber with inner-cladding structure,” Optical Engineering Lett., vol. 44, no. 9, pp. 090503-1, 2005

Selected Patents

  • UNITED STATES OF AMERICA: Patent Number 7844189 (11/30/2010): Phase controllerable optical delay interferometer, optical differential phase shift keying demodulator using the same, and demodulating method
  • KOREA: Patent Number 10-0752362: Optical time delay interferometer with phase variable function for aligning two partial reflecting structures on one optical fiber at a predetermined interval and inserting a unit for variable phase through the change of reflective index between two partial reflecting structures