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| All Patents in class 33/274 | |||||
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| Number | Date | Patentee | Title | Type | |
| 313,659 | Mar. 10, 1885 | J.H. Dolman | Surveyor's Instrument | surveying apparatus | |
| 513,377 | Jan. 23, 1894 | C. Hager, V. De Ziegler | Instrument for Ascertaining Distances | surveyor | |