DOWTY HYDRAULIC UNITS LTD has a total of 508 patent applications. Its first patent ever was published in 1952. It filed its patents most often in United Kingdom, United States and Germany. Its main competitors in its focus markets mechanical elements, engines, pumps and turbines and transport are KAEMPER MOTOREN G M B H, AXEL WICKMAN TRANSMISSIONS LTD and GRANBOM BO.
# | Country | Total Patents | |
---|---|---|---|
#1 | United Kingdom | 193 | |
#2 | United States | 84 | |
#3 | Germany | 66 | |
#4 | France | 57 | |
#5 | Canada | 30 | |
#6 | Belgium | 15 | |
#7 | Japan | 9 | |
#8 | Sweden | 7 | |
#9 | South Africa | 7 | |
#10 | Switzerland | 6 | |
#11 | Spain | 5 | |
#12 | Norway | 5 | |
#13 | Austria | 4 | |
#14 | Finland | 4 | |
#15 | Italy | 4 | |
#16 | EPO (European Patent Office) | 3 | |
#17 | India | 3 | |
#18 | Hungary | 2 | |
#19 | Denmark | 1 | |
#20 | Ireland | 1 | |
#21 | Mexico | 1 | |
#22 | Turkey | 1 |
# | Industry | |
---|---|---|
#1 | Mechanical elements | |
#2 | Engines, pumps and turbines | |
#3 | Transport | |
#4 | Machines |
# | Technology | |
---|---|---|
#1 | Gearing | |
#2 | Railway equipment | |
#3 | Servomotors | |
#4 | Machines | |
#5 | Unspecified technologies | |
#6 | Rotary-pistons | |
#7 | Couplings | |
#8 | Pumps | |
#9 | Venting or aerating devices | |
#10 | Vehicle transmission mounting |
# | Name | Total Patents |
---|---|---|
#1 | Thoma Oswald | 69 |
#2 | Bick David Ewart | 33 |
#3 | Kempson Bertram Carl | 30 |
#4 | Bowers Eric Hider | 27 |
#5 | Oswald Thoma | 22 |
#6 | Bowers Eric H | 16 |
#7 | Checkley Peter Edward | 15 |
#8 | Parry Ian Charles | 13 |
#9 | Boydell Kenneth Raymond | 12 |
#10 | Bick David E | 11 |
Publication | Filing date | Title |
---|---|---|
GB8923775D0 | An hydraulic pump | |
GB8916015D0 | Rotary positive displacement hydraulic machines | |
GB8910633D0 | A railway retarding device | |
GB8900341D0 | "Fast response solenoid" | |
GB8729064D0 | Fast response solenoid | |
US4796655A | Fluid control devices | |
GB8626678D0 | Electrohydraulic proportional control valves | |
GB8621532D0 | Fluid control devices | |
GB8610205D0 | Induction coil | |
GB8529389D0 | Booster assemblies | |
GB8505059D0 | Retarders suitable for wagon speed control | |
GB8428461D0 | Electromagnetic devices | |
GB8415879D0 | Rotary positive displacement fluid-pressure machines | |
DE3420541A1 | Jet propulsion unit for watercraft, and watercraft equipped with such units | |
GB8413540D0 | Marine jet propulsion units | |
GB8412211D0 | Retarders | |
GB8404169D0 | Electrohydraulic servo valve | |
GB8330250D0 | Rotary positive-displacement fluid-pressure machines | |
DE3334563A1 | Shunting station | |
GB8320891D0 | Railway marshalling yards |