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| Patents for National Drafting Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 622,128 | Mar. 28, 1899 | W.C. Day | Combined drafting and measuring tool | compasses | |
| 639,696 | Dec. 19, 1899 | W.C. Day | Device for handling barrels | barrel making machines | |