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 |
| Joka-Werke Johann Kapsamer GmbH & Co KG | Atzbacher Straße 17 | 4690 | Schwanenstadt | 06.05.1971 | revocable |
| Josko Fenster und Türen GmbH | Josko-Straße 1 | 4794 | Kopfing | 29.07.1996 | revocable |
| Joh. Zellinger GmbH & Co KG | Kremstalstr. 102 | 4050 | Traun | 04.08.1977 | revocable |
| Josef Koll KG | Linzerstraße 50 | 4690 | Schwanenstadt | 12.04.1978 | revocable |
| Josef Wick & Söhne GmbH & Co KG | Wiener Str. 125 | 4020 | Linz | 10.09.1981 | revocable |
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
