Patent of Mary Hallock-Greenewalts colour organ (Q31164)
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Revision as of 20:47, 29 April 2023 by ChrisVG (talk | contribs) (Created claim: Property:P37: https://patents.google.com/patent/US1731772A/en)
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No description defined
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent of Mary Hallock-Greenewalts colour organ | No description defined |
