Difference between revisions of "Patent for a device for projecting backgrounds. Geyling, Planner, 1932 (Q38410)"
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Latest revision as of 09:00, 5 August 2026
No description defined
- AT107235B
| Language | Label | Description | Also known as |
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| English | Patent for a device for projecting backgrounds. Geyling, Planner, 1932 | No description defined |
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