Ericsson spent 50 years of his life inventing Hot Air Engine among many other inventions.
| Year | Patent Download | Comment | Title | Engine type |
|---|---|---|---|---|
| 1833 | Ericsson patent | Patent not found | External combustion, closed cycle | |
| 1851 | Ericsson patent #8,481 | The famous Ericsson Caloric Engine used on the Ericsson Ship | Improvements in Air Engines | External combustion, open cycle |
| 1855 | Ericsson patent #13,348 | Improvements in Air Engines | ||
| 1856 | Ericsson patent #14,690 | Air Engines | ||
| 1858 | Ericsson patent #22,281 | Ericsson's first successful Air Engine | Air Engines | External combustion, open cycle |
| 1860 | Ericsson patent #30,306 | Air Engines | ||
| 1880 | Ericsson patent #226,052 | Successful Air Engine invented by Ericsson and built by Delamater | Air Engines | External combustion, closed cycle |
| 1880 | Ericsson patent #Re 9,414 | Reissue of patent #226,052 | Air Engines | |
| 1890 | Ericsson patent #431,729 | Probably the best Ericsson Air Engine | Air Engines | External combustion, open cycle |