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| Patents Granted on 1984-04-17 | |||||
| Number | Date | Patentee | Title | Type | |
| D273,468 | Apr. 17, 1984 | T. Kanou, T. Shirai, M. Ueda | Micrometer | micrometers | |
| D273,469 | Apr. 17, 1984 | T. Kanou, T. Shirai, M. Ueda | Micrometer | micrometers | |