Hansen, J. W.
k.A. // Autor verschiedener Berichte für die Studiengesellschaft für die Nutzbarmachung schweizerischer Lagerstätten mineralischer Rohstoffe
| Identifier | Title | Date | Event type | Other information | |
|---|---|---|---|---|---|
| EBA 5/113 | 1969 | Creation | Standard period of protection | ||
| EBA 5/114 | 1970 | Creation | Standard period of protection | ||
| EBA 5/115 | 1971 | Creation | Standard period of protection | ||
| EBA 5/116 | 1971 | Creation | Standard period of protection | ||
| EBA 5/117 | 1971 | Creation | Standard period of protection | ||
| EBA 5/118 | 1971 | Creation | Standard period of protection | ||
| EBA 5/119 | 1969 | Creation | Standard period of protection |