Difference between revisions of "Patent for a Buehnenscheinwerfer, Willy Hagedorn, 1921 (Q31872)"
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(Created claim: Copy available online (P37): https://worldwide.espacenet.com/patent/search/family/007165068/publication/DE374015C?q=pn%3DDE374015C) | (Created claim: mentions (P78): iris (Q3124)) | ||
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Property / Backup document: DE374015C_Original_document_20230730220849.pdf / rank | |||
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Property / Internal image: DE_374015_C.png / rank | |||
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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