Defunct, Operated from ≤ to
| Roller Coasters Built | 42 |
|---|---|
| Roller Coaster Locations | 55 |
| Extant Roller Coasters | 14 |
| Owned by Carl Miler who died in 2001 and was the father of Fred Miler who operates E&F Miler Industries with his son Eric. |
| Carl Miler is believed to have constructed and operated roller coasters before offering them for sale. One of his first advertisements is the April 21st 1953 issue of Billboard offered a "Rollo Coaster" for $6,750.09 USD. |