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KOLFERTZ ERWIN

Overview
  • Total Patents
    34
About

KOLFERTZ ERWIN has a total of 34 patent applications. Its first patent ever was published in 1959. It filed its patents most often in France, Germany and United Kingdom. Its main competitors in its focus markets agriculture, engines, pumps and turbines and electrical machinery and energy are MEIKO PET CORP, KARMOEY WINCH AS and KOLFERTZ E.

Patent filings in countries

World map showing KOLFERTZ ERWINs patent filings in countries
# Country Total Patents
#1 France 7
#2 Germany 5
#3 United Kingdom 5
#4 United States 5
#5 Belgium 3
#6 Switzerland 3
#7 Canada 2
#8 Austria 1
#9 German Democratic Republic 1
#10 Philippines 1
#11 Sweden 1

Patent filings per year

Chart showing KOLFERTZ ERWINs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kolfertz Erwin 17
#2 Erwin Kolfertz 3

Latest patents

Publication Filing date Title
US4162876A Electromagnetically driven diaphragm pump
DE2645175A1 Membrane air pump for aquarium - has sprung arm oscillated by electromagnet to excite membrane connected by nonreturn valves to entry and exit chambers
DE2603098A1 Membrane air pump for aquarium - has sprung arm oscillated by electromagnet to excite membrane connected by nonreturn valves to entry and exit chambers
GB1277976A Pumping apparatus
DE1938430A1 Electric double diaphragm pump
GB1221150A Improvements relating to heating rods
DE1703482A1 Pump, especially for aquariums
GB1183727A Improvements in Devices for Circulating and Aerating Aquarium Water.
GB961791A Improvements relating to box frame structures
GB924932A Improvements in and relating to aerators for aquaria
CA746336A Frame structures
CA916216A Vibrating motor-pump apparatus with adjustable field coil