File:USpatent1184733 1914.gif
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![File:USpatent1184733 1914.gif](https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/USpatent1184733_1914.gif/800px-USpatent1184733_1914.gif?20050203235211)
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Original file (1,730 × 1,261 pixels, file size: 100 KB, MIME type: image/gif)