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DUPONT RES & INVEST SERVICE

Overview
  • Total Patents
    19
About

DUPONT RES & INVEST SERVICE has a total of 19 patent applications. Its first patent ever was published in 1973. It filed its patents most often in Germany, France and Austria. Its main competitors in its focus markets engines, pumps and turbines, thermal processes and electrical machinery and energy are LAING KARSTEN A, STANDARD MAGNET AG and NANJING CIGU LTD CORP.

Patent filings in countries

World map showing DUPONT RES & INVEST SERVICEs patent filings in countries
# Country Total Patents
#1 Germany 6
#2 France 4
#3 Austria 3
#4 United Kingdom 2
#5 Canada 1
#6 Italy 1
#7 Japan 1
#8 United States 1

Patent filings per year

Chart showing DUPONT RES & INVEST SERVICEs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Walker Alan J 3
#2 Laing Nikolaus 2
#3 Walker Alan John 1
#4 Heuvel E Jan Van Den 1
#5 Daburiyuu Jii Heiwaado 1

Latest patents

Publication Filing date Title
ATA398276A Magnetic response for an electric motor
ATA395779A Magnetic response for electric motors
DE2623438A1 Magnetic flux return system - is for motors with spherical airgap in hermetically sealed chemical pumps
US4072446A Electromagnetically driven pumps
CA1044515A Electromagnetically driven pumps
DE2438830A1 MAGNETIC CLUTCH
GB1435435A Heat exchanger system
DE2420734A1 Pump for circulating cooling fluid - has rotor with sealed end of shaft forming part of magnetic circuit
DE2420733A1 Air conditioner for rooms, buildings, etc. - with two rotary heat-exchange fans
GB1494193A Fluid energy conversion machines