| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | France | 7 | |
| #3 | Japan | 6 | |
| #4 | Netherlands | 6 | |
| #5 | United Kingdom | 5 | |
| #6 | Italy | 5 | |
| #7 | United States | 4 | |
| #8 | Sweden | 3 | |
| #9 | Belgium | 2 | |
| #10 | Canada | 2 | |
| #11 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Servomotors | |
| #4 | Pipes | |
| #5 | Magnets and transformers | |
| #6 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hart John Charles Humphreys | 4 |
| #2 | Gillespie Peter J | 2 |
| #3 | Gillespie Peter James | 2 |
| #4 | Piitaa Jieemusu Girusupii | 2 |
| #5 | Hart J C H | 2 |
| #6 | Paddington Arthur Loftus | 2 |
| #7 | Jiyoon Chiyaarusu Hamufuriizu | 1 |
| #8 | Deibitsudo Taanaa | 1 |
| #9 | Hart John Charleshumphreys | 1 |
| #10 | Jiyon Chiyaarusu Hanfuriizu Ha | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS52114121A | Damping device for spool valve | |
| US4079752A | Pipe couplings | |
| DE2628891A1 | VALVE | |
| JPS51127372A | Actuator | |
| GB1515982A | Valves | |
| DE2608701A1 | Valve for fluid operated machine tool - has sliding actuator coacting with circumferentially extending slots in sleeve | |
| JPS52100625A | Valve device | |
| GB1479770A | Valves | |
| US4021016A | Valves | |
| GB1504885A | Pipe couplings | |
| IT1030686B | Sliding distribution valve - used in control units such as jacks driving machine-tools | |
| GB1433795A | Valves | |
| GB1433796A | Valves |