This directory aims at historical review only and does not claim to provide actual information.
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
| Ytong Gesellschaft m.b.H. | Wachaustraße 69 | 3382 | Loosdorf | 16.09.1991 | revocable |
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
