| Identifier | Title | Date | Event type | Other information | |
|---|---|---|---|---|---|
| KBA 9310.18 | 14th Jul 1910 | Creation | digitized | prolonged period of protection | ||
| KBA 9310.29 | 16th Dec 1910 | Creation | digitized | prolonged period of protection | ||
| KBA 9311.104 | 10th Nov 1911 | Creation | digitized | prolonged period of protection |