01. Developed composition and manufacturing skill of magnetic core materials for PLC devices.

· Arr Patent no.0415119 ( registration December 30th, 2003)
“Development of Blocking filter for PLC and Mn-Zn ferrite magnetic core materials for transformer application”

· Arr Patent no.0725546 ( registration May 30th, 2007)
“Manufacturing method and composition of material for magnetic core”

02. Developed design and manufacturing method of an inductive coupler for PLC application.

· The unique technology in Korea and the establishment of a mass production system.

· Technology to design and manufacture with various power line specifications.

· Patent no.0542137 ( registration January 3rd, 2006)
“Structure and manufacturing method of inductive coupler for Power Line Communication”

· Patent no.10-2007-0133885
“embedded type inductive coupler for Power Line Communication”

03. Developed design and manufacturing method of a Blocking Filter for PLC application.

· Technology to design and manufacture the broad bandwidth blocking filter.

· Establishment of a mass production system.

· Patent no.10-2007-0007282 ( application January 24th, 2007)
“Structure and manufacturing method of blocking filter for PLC”

04. Developed design and manufacturing method of a coupling unit and modem for PLC application.

· Technology for the phase coupling unit (single phase, 3 phase 3 wire, 3 phase 4 wire)

· Master PLC modem.

· PLC repeat.

05. Installation of AMR system and design PLC network.

· Installation of AMR system based on PLC.

· Design and manufacturing method of PLC to serial communication modem.

· Patent no.10-2007-0045273 ( application May 10th, 2007 )
“AMR method based on PLC through neutral line”

06. Installation and design of PLC network in the ship.

· Technology to install PLC network between devices based on IP in ship