| Relationships | Role | Relationship Start | Relationship End |
| Mount Vernon Corporation | Parent | 12/31/1970 | 4/1/1974 |
| G.M. Development Co. | Subsidary | 12/31/1970 | 4/1/1974 |
| Perimeter Ventures Inc. | Subsidary | 12/31/1971 | 4/1/1974 |
| Relationships | Role | Relationship Start | Relationship End |
| Mount Vernon Corporation | Parent | 12/31/1970 | 4/1/1974 |
| G.M. Development Co. | Subsidary | 12/31/1970 | 4/1/1974 |
| Perimeter Ventures Inc. | Subsidary | 12/31/1971 | 4/1/1974 |