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DOOYOUNG ELECTRONICS CO LTD

Overview
  • Total Patents
    19
About

DOOYOUNG ELECTRONICS CO LTD has a total of 19 patent applications. Its first patent ever was published in 2002. It filed its patents most often in Republic of Korea. Its main competitors in its focus markets electrical machinery and energy, environmental technology and mechanical elements are GROUPS TECH CO LTD, MAIOLI VALERIO and MERLOT LAB INC.

Patent filings in countries

World map showing DOOYOUNG ELECTRONICS CO LTDs patent filings in countries
# Country Total Patents
#1 Republic of Korea 19

Patent filings per year

Chart showing DOOYOUNG ELECTRONICS CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kim Jong Oh 10
#2 Lee Seong Yeon 8
#3 Kim Young Nam 8
#4 Kim Yeong Nam 8
#5 Lee Ho Seon 5
#6 Ko Hyeong Gon 3
#7 Kwon Yong Hu 3
#8 Lee Sung Youn 3
#9 Kim Jeong Hwan 2
#10 Kim Dae Sik 2

Latest patents

Publication Filing date Title
KR100719999B1 Silicon applying system and method
KR100672038B1 Electronic ballast having a dimming-controlling part of which the lamp current is maintained uniformly by feedback-controlling with the detected current
KR100707400B1 Electronic ballast driven by dc power supply having the circuit protected from high input voltage and high output current
KR100687937B1 Electronic ballast having a dimming-controlling part including initial dimming-controlling circuit
KR100707415B1 Electronic ballast driven by dc power supply having the circuit protected from low input voltage and low input/output current
KR100672035B1 Electronic ballast having a dimming-controlling part driven by a separate power supply
KR100707398B1 Electronic ballast driven by dc power supply having the circuit started at a low voltage
KR100672028B1 Fluorescent lamp ballast for controlling dimming
KR100707394B1 Electronic ballast having starting aid circuit
KR20060126027A Delay blackout ballast
KR20050115658A Electronic ballast of lamp having a glowstarter
KR20040061560A Electronic ballast having protection circuit
KR20040061516A A program start typed electronic ballast
KR20040061649A An electric ballast with step typed dimming circuit
KR20040061622A An instant start typed electric ballast
KR20040061537A Electronic ballast having protection circuit for overload
KR20040061579A Illumination Control Electric Neon Ballast
KR20040061639A Smoothing circuit for removing the ripple current
KR20040061569A Electronic Neon Ballast