Category:1887 patents
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Subcategories
This category has the following 2 subcategories, out of 2 total.
A
- Alexander violin (1 F)
M
- Melotrope (1 F)
Media in category "1887 patents"
This category contains only the following file.
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Alexander Violin (Metropolitan Museum of Art).jpg 718 × 1,154; 54 KB