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| All Patents in class 242/405 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,518,414 | Aug. 08, 1950 | E.J. Witchger | Demountable adjusting means for machine gauges | ||
| 2,589,500 | Mar. 18, 1952 | R.K. Landon, J.R. Thomson | Strait-Line | plumb bobs | |