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| All Patents in class 116/292 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,608,947 | Sep. 02, 1952 | W. Ames | Gauge | ||
| 3,086,494 | Apr. 23, 1963 | N.J. Smith | Precision dial assembly for gauges | vacuum and pressure gauges | |