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| All Patents in class 235/70C | |||||
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| Number | Date | Patentee | Title | Type | |
| 71,979 | Dec. 10, 1867 | T. Carter | Improvement in Sawyers' Rules | rule graduations | |
| 854,325 | May 21, 1907 | H.F. Belcher | Desk Ruler | rules | |
| 858,498 | Jul. 02, 1907 | J.L. Bartels | Ruler | rules | |
| 962,035 | Jun. 21, 1910 | E.S. Mackoy | Ullage Rod | ||
| 1,490,210 | Apr. 15, 1924 | Z. Hsieh | Meter | electrical measuring apparatus | |
| 2,530,955 | Nov. 21, 1950 | H.J. Gerber | Instrument for measuring, interpolating, and the like | ||