File:GWP-836531Patent.png
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Size of this preview: 640 × 600 pixels. Other resolutions: 256 × 240 pixels | 935 × 876 pixels.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:13, 11 May 2007 | 935 × 876 (15 KB) | commons>Reddi | U.S. Patent 836,531 "Means for receiving intelligence communicated by electric waves", 1906. G. W. Pickard. |
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