| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Transport | |
| #5 | Civil engineering | |
| #6 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Supplying combustion engines | |
| #2 | Venting or aerating devices | |
| #3 | Unspecified technologies | |
| #4 | Pumps | |
| #5 | Internal-combustion piston engines | |
| #6 | Shafts | |
| #7 | Fire-fighting | |
| #8 | Animal care | |
| #9 | Aeroplanes | |
| #10 | Hot gas positive-displacement engine plants |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carnahan Orson A | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2766769A | Float actuated valve | |
| US2992536A | External combustion gas engine | |
| US2671469A | Balanced valve structure | |
| US2613144A | Backfire trap | |
| US2632622A | Valve adapted for float operation | |
| US2648527A | Heat exchanger | |
| US2629570A | Helicopter-airplane | |
| US2441797A | Fluid pressure mechanism | |
| US2347663A | Hydraulically balanced bearing | |
| US2110498A | Drink mixer | |
| US1946015A | Combined back fire trap and air cleaner for internal combustion engines | |
| US1946014A | Back fire trap for internal combustion engines |