| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements | |
| #3 | Control | |
| #4 | Engines, pumps and turbines | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Aeroplanes | |
| #2 | Shafts | |
| #3 | Traffic control systems | |
| #4 | Marine propulsion | |
| #5 | Unspecified technologies | |
| #6 | Vehicle tyre repairing | |
| #7 | Internal-combustion piston engines | |
| #8 | Cyclically operating valves | |
| #9 | Clutches and brakes | |
| #10 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruths Robert J | 15 |
| #2 | Dodson Harry L | 7 |
| Publication | Filing date | Title |
|---|---|---|
| US2343329A | Diesel engine | |
| US2282345A | Bearing structure | |
| US2276347A | Hub construction for hydraulic operated variable pitch propellers | |
| US2237316A | Bearing structure | |
| US2239739A | Variable pitch propeller | |
| US2246539A | Variable pitch propeller | |
| US2187754A | Variable pitch propeller | |
| US2188313A | Fluid pressure operated variable pitch propeller | |
| US2208602A | Hub construction for variable pitch propellers | |
| US2210009A | Hydraulic operated variable pitch propeller | |
| US2165305A | Signal device | |
| US2037048A | Coupling | |
| US1886980A | Signal | |
| US1589566A | Internal-combustion engine | |
| US928334A | Pneumatic tire. |