Difference between revisions of "Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 (Q31872)"
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(Changed [en] description: a spotlight with a diafragm and mirror.) | (Created claim: broken link (P371): https://worldwide.espacenet.com/patent/search/family/007165068/publication/DE374015C?q=pn%3DDE374015C, #quickstatements; #temporary_batch_1785920393956) | ||
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Latest revision as of 08:59, 5 August 2026
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