| Year | Patent Download | Comment | Title | Engine type |
|---|---|---|---|---|
| 1856 | McDonough patent #15,771 | Air Engines | ||
| 1862 | McDonough patent #34,155 | Improved Hot Air Engine | ||
| 1864 | McDonough patent #44,966 | Improvement in Hot Air Engines | ||
| 1866 | McDonough patent #52,305 | Improvement in Hot Air Engines | ||
| 1869 | McDonough patent #96,335 | Improvement in Hot Air Engines | ||
| 1883 | McDonough patent #278,446 | Hot Air Engine |