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| All Patents in class 33/642 | |||||
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| Number | Date | Patentee | Title | Type | |
| 937,978 | Oct. 26, 1909 | P.G. Wheeler | Test Indicator | test indicators | |
| 1,395,087 | Oct. 25, 1921 | H.O. Brion | Center-testing device | measuring tools | |
| 1,994,497 | Mar. 19, 1935 | A.G. Winters | Indicator | measurement gauges | |
| 2,807,093 | Sep. 24, 1957 | M. Sanchez | Precision locator gage for boring mill | gauges | |
| 4,890,421 | Jan. 02, 1990 | K.S. Barney, W.R. Moore, Jr. | Automatic Measurement System | measuring tools | |
| 5,918,652 | Jul. 06, 1999 | E.C. Tucker | Router bit positioning mechanism | ||