Defunct, Operated from to
| Roller Coasters Built | 37 |
|---|---|
| Roller Coaster Locations | 41 |
| Extant Roller Coasters | 3 |
| Builder | 6 |
| Designer | 2 |
| By 1959, NAD is said to have built more than 400 roller coasters. |
| Started by Aurel Vaszin who moved to the United States in 1912 from Romania. |
| In 1973 Aurel Vaszin sold the company to a Toledo firm, which renamed it the International Amusement Device Inc. |