| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Spain | 2 | |
| #2 | United Kingdom | 2 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | Denmark | 1 | |
| #8 | France | 1 | |
| #9 | Italy | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Norway | 1 | |
| #12 | New Zealand | 1 | |
| #13 | Sweden | 1 | |
| #14 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Parker J F | 3 |
| #2 | Parker J | 2 |
| #3 | Parker John Frederick | 1 |
| #4 | Parker John F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB8328902D0 | Exhaust braking system for ic engine | |
| GB1501631A | Exhaust brakes |