| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Japan | 2 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Spain | 1 | |
| #6 | Italy | 1 | |
| #7 | Sweden | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Butcher David Henry | 5 |
| #2 | Deibitsudo Henrii Batsuchiyaa | 2 |
| #3 | Butcher David H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS5317831A | Valve device | |
| DE2624648A1 | DEVICE FOR REGULATING THE AIR SUPPLY OF A COMBUSTION ENGINE | |
| US4100893A | Pressure-responsive transducer for regulating internal combustion engine | |
| ES333402A3 | Procedure for the manufacture of an electrical lighting reflector. (Machine-translation by Google Translate, not legally binding) |