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| Patents Granted on 1984-02-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,433,709 | Feb. 28, 1984 | L.W. Porter | Drywall hatchet | ||
| 4,433,871 | Feb. 28, 1984 | R. Bertrand | Machine for Cutting Curbstones, Sidewalls and the like | stone cutting machines | |