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| All Patents in class 116/DIG.23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,530,067 | Mar. 17, 1925 | H.J. Young | Indicator for Gauges | gauges | |
| 2,707,931 | May 10, 1955 | W.J. Croshier, E.M. Boat | Tolerance Marker for Dial Indicator Gages | ||