File:Baldwin 706375 patent.png
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U.S. Patent 706,375; w:Calculating Machine; August 5, 1902
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:29, 22 December 2006 | | 746 × 1,096 (61 KB) | Richard Arthur Norton (1958- ) | {{US patent|706375}}; Calculating Machine; August 5, 1902 |
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