| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 20 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Measurement | |
| #5 | Engines, pumps and turbines | |
| #6 | Textiles and paper | |
| #7 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Servomotors | |
| #3 | Venting or aerating devices | |
| #4 | Electric switches | |
| #5 | Writing or drawing tools | |
| #6 | Pistons and sealings | |
| #7 | Pipes | |
| #8 | Cyclically operating valves | |
| #9 | Spinning | |
| #10 | Testing of structures |
| # | Name | Total Patents |
|---|---|---|
| #1 | Buchanan J D | 20 |
| #2 | Adler Paul W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB8301725D0 | Valve | |
| US3331383A | Electro-hydraulic servo valves | |
| US2810254A | Yarn twisting device | |
| US2797061A | Solenoid operated shut-off valve | |
| US2748219A | Hydraulic pressure operated switch | |
| US2736778A | Hydraulic pressure operated switch | |
| US2730124A | Valve | |
| US2569598A | Four-way valve | |
| US2490944A | Reciprocating valve | |
| US2442916A | Hydraulic booster | |
| US2393747A | Expansible piston | |
| US2397594A | Hydraulic motor or pump | |
| US2402729A | Variable restrictor | |
| US2385329A | Pencil | |
| US2410404A | Valve | |
| US2387007A | Valve actuating system | |
| US2387008A | Valve mechanism | |
| US2387006A | Valve | |
| US2348189A | Vibration testing device | |
| US2353874A | Metalworking apparatus |