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.
# | Country | Total Patents | |
---|---|---|---|
#1 | Germany | 7 | |
#2 | Canada | 2 | |
#3 | Japan | 2 | |
#4 | United States | 2 | |
#5 | EPO (European Patent Office) | 1 | |
#6 | France | 1 |
# | Industry | |
---|---|---|
#1 | Engines, pumps and turbines | |
#2 | Machines | |
#3 | Mechanical elements | |
#4 | Environmental technology |
# | Technology | |
---|---|---|
#1 | Machines | |
#2 | Unspecified technologies | |
#3 | Internal-combustion piston engines | |
#4 | Pumps | |
#5 | Gearing | |
#6 | Pistons and sealings | |
#7 | Climate change mitigation in transportation |
# | Name | Total Patents |
---|---|---|
#1 | Harr Ewald | 12 |
#2 | Ebuaruto Haru | 2 |
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 |