File:Beardpatent.jpg
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Beardpatent.jpg (349 × 435 pixels, file size: 47 KB, MIME type: image/jpeg)
The diagram from Beard's 1897 coupler patent.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:46, 12 January 2009 | 349 × 435 (47 KB) | Jvv (talk | contribs) | The diagram from Beard's 1897 coupler patent. |
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