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CHANGCHUN DU

Overview
  • Total Patents
    13
About

CHANGCHUN DU has a total of 13 patent applications. Its first patent ever was published in 1992. It filed its patents most often in China. Its main competitors in its focus markets environmental technology and engines, pumps and turbines are MICHALCZYK EDWARD, LU MAOGAO and TATSUOKA TETSUJI.

Patent filings in countries

World map showing CHANGCHUN DUs patent filings in countries
# Country Total Patents
#1 China 13

Patent filings per year

Chart showing CHANGCHUN DUs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Changchun Du 8
#2 Du Changchun 5

Latest patents

Publication Filing date Title
CN1144308A Static-pressure controlled clutch
CN1125297A Planetary fraction cone reductor and differential mechanism
CN1114018A Static balance combined high pressure rotary shaft oil seal
CN1114011A Eccentric piston rod type liquid driving cylinder
CN1120131A Composite rolling body automatic pumping oil lubricating type radial rolling bearing
CN1118849A Master and slave rolling body type axial thrust rolling bearing
CN1084616A Self-pumping oil lubricated axial thrust rolling bearing
CN1084618A Self-pumping oil lubricated radial sliding bearing
CN1084619A Automatic pumping oil lubricating type radial rolling bearing
CN1083903A Composite-type roller bearing
CN1087971A Axial plunger type variable capacity pump
CN1087972A Axial plunger pump and motor
CN1079535A Tangential fluidic force driving rotating fluid-mechanical energy conversion device