| Identifier | Title | Date | Event type | Other information | |
|---|---|---|---|---|---|
| KBA 9322.106 | 16th Apr 1922 | Creation | digitized | prolonged period of protection | ||
| KBA 9323.159 | 10th May 1923 | Creation | digitized | prolonged period of protection | ||
| KBA 9356.619 | 8th May 1956 | Creation | digitized | prolonged period of protection |