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CHANGMIN TRADE COMPANY

Overview
  • Total Patents
    15
About

CHANGMIN TRADE COMPANY has a total of 15 patent applications. Its first patent ever was published in 1993. It filed its patents most often in Republic of Korea. Its main competitors in its focus markets measurement, telecommunications and it methods for management are SUINTECH CO LTD, MICKLER BRIAN E and ANDRAE WASSERMESSER.

Patent filings in countries

World map showing CHANGMIN TRADE COMPANYs patent filings in countries
# Country Total Patents
#1 Republic of Korea 15

Patent filings per year

Chart showing CHANGMIN TRADE COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Jang Hak-Soo 5
#2 Hwang Gyu Bo 3
#3 Kwon Chan Keun 2
#4 Yum Dong Yeop 2
#5 Lee Hyeon Dong 1
#6 Kwon Hyeok Myeong 1
#7 Baek Jong-Seung 1
#8 Nam Sang Yong 1
#9 Jong Hak-Soo 1
#10 Lim Gyu Yeong 1

Latest patents

Publication Filing date Title
KR20100101937A Method for manufacturing multi-path ultrasonic flow meter
KR20040107037A Device of closing cable up for waterproof
KR20040099039A Apparatus for measuring the speed of sound and Methode of measuring delayed time in ultrasonic flowmeter by using the apparatus and Methode of measuring distance between ultrasonic transducers in fluid by using the apparatus
KR20040072277A A sewer pipe maintenance system and construction method thereof
KR20020082505A Independently operating system for flux measurement
KR20010066980A Total Water Works Management System
KR20010097550A Ultrasonic flow velocity measuring apparatus
KR20000001368A Measuring method for horizontal average speed of current of rivers
KR100266910B1 Vertical average flow speed measurement device for river etc.
KR0170815B1 Ultrasonic multi circuit flowmeter
KR0185260B1 Water level measuring method and apparatus thereof
KR0169091B1 Ultrasonic discharge measurement in streams for open ditch
KR0169090B1 Apparatus and method of discharge measurement in streams
KR960013251B1 Flow metter