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HARR EWALD

Overview
  • Total Patents
    15
About

HARR EWALD has a total of 15 patent applications. Its first patent ever was published in 1971. It filed its patents most often in Germany, Canada and Japan. Its main competitors in its focus markets engines, pumps and turbines, machines and mechanical elements are BRACKETT DOUGLAS C, KARLSSON HANS and GIRODIN MARIUS GEORGES HENRI.

Patent filings in countries

World map showing HARR EWALDs patent filings in countries

Patent filings per year

Chart showing HARR EWALDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Harr Ewald 12
#2 Ebuaruto Haru 2

Latest patents

Publication Filing date Title
DE4237463A1 Differential gear
CA1079648A Piston power generating machine
CA1079647A Piston power generating and working machine
US4132118A Piston power generating and working machine
JPS5238603A Piston type operating machines
DE2610969A1 Engine whose piston rotates as it reciprocates - has two opposed cylinders with pistons moved from same crank
DE2610968A1 Engine with piston rotating as it reciprocates - has hollow tube projecting into piston to carry cooling fluid
DE2602436A1 Piston engine with sliding and rotating pistons - has off centre piston rod with plain bearing mounted on crankpin
DE2161798A1 COMBUSTION MACHINERY