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| Patents for Waltham Watch Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 193,609 | Jul. 31, 1877 | C. Hopkins | Improvement in slide-rests for watch-makers' lathes | watchmakers lathes | |
| 196,228 | Oct. 16, 1877 | C. Hopkins | Improvement in watch-makers' lathes | watchmakers lathes | |
| 570,723 | Nov. 03, 1896 | C.E. Van Norman | Milling Machine | milling machines | |