File:USpatent278043 1883.gif
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![File:USpatent278043 1883.gif](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/USpatent278043_1883.gif/542px-USpatent278043_1883.gif?20060213091428)
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Original file (1,265 × 1,398 pixels, file size: 66 KB, MIME type: image/gif)