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| All Patents in class 116/311 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,530,067 | Mar. 17, 1925 | H.J. Young | Indicator for Gauges | gauges | |
| 2,921,553 | Jan. 19, 1960 | F.O. Luenberger | Adjustable date indicator | ||