| Patents Granted on 1825-03-15 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 4,051X | Mar. 15, 1825 | E. Gray | Construction of rail ways | |
| 4,052X | Mar. 15, 1825 | D. Comstock | Machine for excavating earth | excavators |
| 4,053X | Mar. 15, 1825 | W. Lowber | Water press for extracting tannin from bark | bark processing machines |
| 4,054X | Mar. 15, 1825 | G. Fountain | Increasing the speed of vessels by a centre board | |
| 4,055X | Mar. 15, 1825 | O. Pettee | Changing the motion of machinery | |
| 4,056X | Mar. 15, 1825 | I.(. Jennings | Improvemnt in the steam engine | steam engines |
