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Patents for David Pray | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 78,105 | May 19, 1868 | N.C. Lombard, M. Bray | Improved machine for forming sheet-metal ware | |
![]() | 79,603 | Jul. 07, 1868 | S. Sawyer | Improvement in Calipers |