| Relationships | Role | Relationship Start | Relationship End |
| Degussa Ag | Parent | 9/30/1987 | 10/1/1993 |
| Mg Technologies Ag | Parent | 12/31/1980 | 9/29/1987 |
| Leybold Inc. | Subsidary | 12/31/1980 | 10/1/1993 |
| Relationships | Role | Relationship Start | Relationship End |
| Degussa Ag | Parent | 9/30/1987 | 10/1/1993 |
| Mg Technologies Ag | Parent | 12/31/1980 | 9/29/1987 |
| Leybold Inc. | Subsidary | 12/31/1980 | 10/1/1993 |