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| All Patents in class 377/24 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 3,142,121 | Jul. 28, 1964 | B. Stefanov | Micrometer | |
 | 3,271,564 | Sep. 06, 1966 | R.G. Moyer, M.A. Rosenfield | Digital Measuring Apparatus | |
 | 3,681,582 | Aug. 01, 1972 | N. Keiichi, K. Kimio | Automatic Sizing Device with Linear Scale | |
 | 4,103,427 | Aug. 01, 1978 | R.E. Ledley, III | Electronic Digital Micrometer | |
 | 4,255,861 | Mar. 17, 1981 | H. Suwa, K. Nakata | Electrically Digital Display Micrometer | |