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| All Patents in class 33/817 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,516,956 | Aug. 01, 1950 | S.J. Carlton | Micrometer | micrometers | |
| 2,639,510 | May 26, 1953 | F.M. Laserson | Micrometer | micrometers | |
| 2,666,263 | Jan. 19, 1954 | F.M. Laserson | Micrometer | micrometers | |
| 3,120,061 | Feb. 04, 1964 | K. Pfleiderer | Counter-Micrometer | micrometers | |
| 4,553,330 | Nov. 19, 1985 | Y. Karahashi, M. Yamauchi | Micrometer | micrometers | |
| 4,561,185 | Dec. 31, 1985 | H. Sakata, H. Yamashiro | Measuring Instrument | measurement gauges | |