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| All Patents in class 33/285 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 270,951 | Jan. 23, 1883 | J.W. Harmon | Artificer's Level | |
| 313,494 | Mar. 10, 1885 | J. Hale | Surveying Instrument | ||
 | 368,308 | Aug. 16, 1887 | C.F. Richardson | Surveyor's transit | |
| 4,752,126 | Jun. 21, 1988 | K. Fujii | Surveying Instrument | ||