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