Mary Elizabeth Hallock Greenewalt papers
The Mary Elizabeth Hallock Greenewalt Papers offer an impressive array of materials touching not only on the creative processes of an artist-inventor but also on an individual’s experience with the United States patent system. Intertwined with the story of Greenewalt’s invention of the color organ... Full description
|Main Author:||Greenewalt, Mary Elizabeth Hallock 1871-1950.|
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