File:Keyboard punch.jpg

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Keyboard_punch.jpg(672 × 435 pixels, file size: 76 KB, MIME type: image/jpeg)

Hollerith Keyboard Punch

Patent Number 487,737

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current11:00, 5 March 2008Thumbnail for version as of 11:00, 5 March 2008672 × 435 (76 KB)Trh249 (Talk | contribs)Hollerith Keyboard Punch Patent Number 487,737
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