Difference between revisions of "Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 (Q31872)"
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(Created claim: Field (P19): lighting and projection (Q7)) | (Created claim: author (P41): Willy Hagedorn (Q2613)) | ||
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| Property / author: Willy Hagedorn / rank | |||
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Revision as of 20:13, 30 July 2023
a spotlight with a diafragm.
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 | a spotlight with a diafragm. |