Models
| Model | Type | Registered | Valid | Built |
|---|---|---|---|---|
| DEFIANT (KELLER) | Fixed wing multi engine | 1 | 1 | 1983-1983 |
| FK 1 STOL | Fixed wing single engine | 1 | 1 | 1989-1989 |
2 models and 2 aircraft registered with the FAA under the manufacturer name KELLER FREDERICK H.
| Model | Type | Registered | Valid | Built |
|---|---|---|---|---|
| DEFIANT (KELLER) | Fixed wing multi engine | 1 | 1 | 1983-1983 |
| FK 1 STOL | Fixed wing single engine | 1 | 1 | 1989-1989 |