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| Patents for H. G. Nichols | |||||
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| Number | Date | Patentee | Title | Type | |
| 608,243 | Aug. 02, 1898 | F.D. Winkley | Oil-hole cover or cap | oil or grease fittings | |
| 608,244 | Aug. 02, 1898 | F.D. Winkley | Oil-hole cover or cap | oil or grease fittings | |