File:USpatent no1167992from1914.gif
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Size of this preview: 800 × 575 pixels. Other resolutions: 320 × 230 pixels | 640 × 460 pixels | 1,024 × 737 pixels | 1,286 × 925 pixels.
Original file (1,286 × 925 pixels, file size: 24 KB, MIME type: image/gif)