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| Patents Granted on 1845-05-01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,017 | May 01, 1845 | R.R. Throckmorton | Machine for planing, tonguing and grooving, rabbeting, and beading planks and other lumber | wood planers | |
| 4,024 | May 01, 1845 | H.A. Pitts | Cutting and Crushing Corn | corn grinders | |
| 4,025 | May 01, 1845 | R.M. Hoe | Printing-press | printer | |
| 4,028 | May 01, 1845 | T. Rogers | Cut-Off Valve for Steam Engines | steam engine valves | |
| 4,029 | May 01, 1845 | J. Semple | Steam Coach Adapted to the Prairies | traction engine wheels | |