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DU WENJUAN

Overview
  • Total Patents
    129
  • GoodIP Patent Rank
    29,367
About

DU WENJUAN has a total of 129 patent applications. Its first patent ever was published in 1919. It filed its patents most often in China and United States. Its main competitors in its focus markets environmental technology, engines, pumps and turbines and electrical machinery and energy are HUMISTON GERALD F, ZHANG NIANDONG and FERNANDEZ FERNANDEZ MARCELINO.

Patent filings in countries

World map showing DU WENJUANs patent filings in countries
# Country Total Patents
#1 China 128
#2 United States 1

Patent filings per year

Chart showing DU WENJUANs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Du Wenjuan 129
#2 Li Haifeng 1
#3 Chen Zhong 1
#4 Wang Haifeng 1
#5 Fu Qiang 1

Latest patents

Publication Filing date Title
CN110835142A Application method of natural ventilation sea ice desalting device
CN110835141A Using method of sea ice desalting device by utilizing natural energy
CN110835140A Building structure of sea ice desalting device
CN110835139A Use method of device for carrying out freshwater treatment on naturally melted sea ice
CN110835134A Device for effectively controlling melting temperature of sea ice according to brine-discharging range
CN110835133A Use method of natural airflow ventilation ice melting device in sea ice desalination production
CN110835126A Device for desalting sea ice by natural ventilation
CN109467139A The application method of sea ice desalting device with automatic ventilation mechanism
CN110835125A Application method of seawater desalination device
CN109704425A Make the building structure of sea ice desalting device using natural airflow ventilation
CN109205721A Use the device for the method progress sea ice desalination for accelerating air-flow
CN109553150A The device for effectively melting sea ice is realized using the flowing of GRAVITY CONTROL air-flow
CN110835138A Using method of device for desalting sea ice by utilizing unpowered ventilation
CN109665587A Natural airflow, which is divulged information, makes the application method of sea ice desalting device
CN109607647A A kind of device making sea ice desalting by gravity methods
CN109205692A A kind of device making sea ice desalting using swabbing effect ventilation
CN110833735A Using method of natural airflow ventilation dust removal device in cotton ginning production
CN109173519A A kind of building structure for the purification device being dusted using quick flow
CN106801406A The sea ice salvaging device promoted using ocean current
CN106801407A The application method of the sea ice salvaging device promoted using ocean current