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| All Patents in class 33/DIG.2 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,954,442 | Apr. 10, 1934 | A.H. Dall, H. Ernst | Grinding Machine | ||
| 1,993,830 | Mar. 12, 1935 | R.E. Conover | Grinding Machine | ||
| 2,775,818 | Jan. 01, 1957 | F. Meyer, Jr. | Fluid Gage Apparatus | ||
| 2,801,475 | Aug. 06, 1957 | F. Meyer, Jr. | Gage for Measuring Circumambient Surfaces | ||
| 3,037,332 | Jun. 05, 1962 | G.S. Butterworth, J.G. Wiatt | Machine Tool Sizing Device | ||
| 4,326,338 | Apr. 27, 1982 | R.A. Plante | Area Comparison Gage | ||