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| All Patents in class 377/53 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,940,365 | Jun. 14, 1960 | J.C. Drader | Control Apparatus | ||
 | 4,103,427 | Aug. 01, 1978 | R.E. Ledley, III | Electronic Digital Micrometer | |
| 4,154,396 | May 15, 1979 | E.E. Kirkham | Digital Data Reader | ||
 | 4,255,861 | Mar. 17, 1981 | H. Suwa, K. Nakata | Electrically Digital Display Micrometer | |