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| Patents for Decatur Coffin Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 306,096 | Oct. 07, 1884 | C.H. Olson | Screw-driver | spiral screwdrivers | |
| 402,538 | Apr. 30, 1889 | C.H. Olson | Tool-driver | spiral screwdrivers | |
| 422,520 | Mar. 04, 1890 | O.Z. Greene | Screw-driver | spiral screwdrivers | |