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| All Patents in class 116/300 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 5,667X | Oct. 10, 1829 | J. Russell | Bell-Hanging | |
 | 268,107 | Nov. 28, 1882 | W. Lang | Speed Indicator | |
| 1,486,968 | Mar. 18, 1924 | H.E. Kempton | Precision Device for Boring Machines and the Like | ||
| 2,707,931 | May 10, 1955 | W.J. Croshier, E.M. Boat | Tolerance Marker for Dial Indicator Gages | ||
| 3,086,493 | Apr. 23, 1963 | E.P. Bullard, III | Indicating Device | ||