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| All Patents in class 33/200 | |||||
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| Number | Date | Patentee | Title | Type | |
| 76,123 | Mar. 31, 1868 | W.C. Wells | Drill Gage | drill accessories | |
| 647,522 | Apr. 17, 1900 | W.J. Rideout | Optical Gage | special purpose gauges | |
| 663,165 | Dec. 04, 1900 | A.M. Frankel | Nose Gage | special purpose gauges | |
| 878,507 | Feb. 11, 1908 | J.M. Coghlan | Opticians Measuring Instrument | optician | |