Difference between revisions of "Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 (Q31872)"
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a spotlight with a diafragm and mirror.
(Changed [en] description: a spotlight with a diafragm and mirror.) | (Created claim: mentions (P78): iris (Q3124)) | ||
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Latest revision as of 20:19, 30 July 2023
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