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| Patents Granted on 1984-02-21 | |||||
| Number | Date | Patentee | Title | Type | |
| D272,710 | Feb. 21, 1984 | M.J. Antonick, S.E. Thorwaldsen | Paving breaker | ||
| 4,432,258 | Feb. 21, 1984 | J.T. Currer | Controllable Tool Feeding Apparatus | metalworking machine mechanisms | |