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| Patents Granted on 1973-04-17 | |||||
| Number | Date | Patentee | Title | Type | |
| 3,727,318 | Apr. 17, 1973 | J. Meier | Micrometer Apparatus | micrometers | |
| 3,728,626 | Apr. 17, 1973 | H.C. Thomas, A.T. Douglas | Electronic Measuring System | electrical measuring apparatus | |