| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Brazil | 1 | |
| #3 | Canada | 1 | |
| #4 | German Democratic Republic | 1 | |
| #5 | Germany | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Spain | 1 | |
| #8 | India | 1 | |
| #9 | Italy | 1 | |
| #10 | Poland | 1 | |
| #11 | Sweden | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Evans Hugh G | 11 |
| #2 | Speer Stephen | 4 |
| #3 | Speer Stephen R | 3 |
| #4 | Speer Stephen A | 2 |
| #5 | Christy James S | 2 |
| #6 | Christy James A | 1 |
| #7 | Lafrenz Stanley S | 1 |
| #8 | Hugh Gleen Evans Stephen Richa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5076220A | Internal combustion engine | |
| US4399665A | Aircraft air conditioning system | |
| CA1184125A | Internal combustion engine | |
| US4428550A | Vibration-insulating stability improving torque force device | |
| US4483147A | Turbocharged engine having an engine speed and throttle position responsive compressor bleed valve |