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| Patents for D. E. Marchant | |||||
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| Number | Date | Patentee | Title | Type | |
| 744,028 | Nov. 17, 1903 | C.E. Billings | Beam-calipers | measurement gauges | |
| 1,183,525 | May 16, 1916 | F.C. Billings | Method of Manufacturing Pliers | pliers | |