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QINGFA CHANG

Overview
  • Total Patents
    11
About

QINGFA CHANG has a total of 11 patent applications. Its first patent ever was published in 2007. It filed its patents most often in China. Its main competitors in its focus markets environmental technology are FRIML ZDENEK, HAIXIA YU and INST POLIOMIELITA VIRUSNYKH EN.

Patent filings in countries

World map showing QINGFA CHANGs patent filings in countries
# Country Total Patents
#1 China 11

Patent filings per year

Chart showing QINGFA CHANGs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Qingfa Chang 11

Latest patents

Publication Filing date Title
CN101428526A Method for papering calligraphy and painting
CN101401620A Holothurian seedling combined bait
CN101401554A Artificial cultivation method for sea horse fry
CN101401553A Method for conveying abalone fry
CN101401552A Artificial method for breeding abalone fry
CN101396011A Method for trapping trumpet shell
CN101396058A Puffing method of ice-cream material
CN101396013A Fishing method using disc float and multi fish-hooks
CN101382134A Composite bush pump
CN101382141A Self-suction centrifugal pump
CN101382222A Fluid delivery connector