Difference between revisions of "Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 (Q31872)"
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a spotlight with a diafragm and mirror.
(Created claim: mentions (P78): iris (Q3124)) | (Created claim: Canon source Id (P369): 1017, #quickstatements; #temporary_batch_1741854387036) | ||
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Revision as of 08:26, 13 March 2025
a spotlight with a diafragm and mirror.
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 | a spotlight with a diafragm and mirror. |
Statements
16 November 1921Gregorian
0 references