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| All Patents in class 33/543 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 505,870 | Oct. 03, 1893 | F.R. Young | Truing Up Indicator | ||
 | 660,688 | Oct. 30, 1900 | W. Lipsy | Scribing Tool | |
| 1,356,214 | Oct. 19, 1920 | H.C. Metzger | Wall Caliper | ||
| 1,673,480 | Jun. 12, 1928 | W. Ames | Gauge | ||
 | 2,337,509 | Dec. 21, 1943 | J.W. Todd | Micrometer Gage | |
 | 2,814,124 | Nov. 26, 1957 | J.L. Blake | Indicator device | |
| 3,458,939 | Aug. 05, 1969 | R.A. Plante | Diameter Gage | ||
| 4,803,783 | Feb. 14, 1989 | M.D. Tiegs, E.C. Gamoke | Apparatus for gauging the diameter and concentricity of a bore | ||