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