Difference between revisions of "Patent for a device for projecting backgrounds. Geyling, Planner, 1932 (Q38410)"
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Revision as of 13:24, 13 February 2025
No description defined
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for a device for projecting backgrounds. Geyling, Planner, 1932 | No description defined |