Difference between revisions of "Patent for a device for projecting backgrounds. Geyling, Planner, 1932 (Q38410)"
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(Created claim: author (P41): Paul Planer (Q38411)) | (Created claim: Canon image id (P74): US_1881355_A.pdf) | ||
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Revision as of 13:23, 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 |