| Patents Granted on 1878-04-23 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| RE8,198 | Apr. 23, 1878 | F.A. Cushman | Improvement in wood-grinders for paper pulp | wood grinding machines |
| 202,633 | Apr. 23, 1878 | N. Clute | Double-Acting Suction and Force Pump | pumps |
| 202,667 | Apr. 23, 1878 | J. Saltar, Jr. | Improvement in loose pulleys | industrial machine pulleys and belt drive mechanisms |
| 202,668 | Apr. 23, 1878 | G. Schleicher | Improvement in circular sawing machines | tablesaws |
| 202,702 | Apr. 23, 1878 | B. Chalfant | Improvement in dies for cutting wooden pins | dowel making machines |
| 202,712 | Apr. 23, 1878 | L. Balcom, J.H. Driscoll | Improvement in log-turners | sawmill log handling |
| 202,768 | Apr. 23, 1878 | F.H. Vannan | Expanding Mandrel | mandrels and arbors |
| 202,838 | Apr. 23, 1878 | J.E. Lavey | Improvement of Watchmakers Lathe Chucks | metal lathe chucks |
| 202,853 | Apr. 23, 1878 | E.E. Miller, C.M. Miller | Portable Engine | portable steam engines |
| 202,862 | Apr. 23, 1878 | M.H. Pitts | Mounted Horse-Power | animal powered apparatus |
| 202,863 | Apr. 23, 1878 | M.H. Pitts | Grain Separator | corn and grain separators |
| 202,866 | Apr. 23, 1878 | G.M. Pratt | Micrometer Gage | micrometers |
| 202,888 | Apr. 23, 1878 | B.H. Taylor | Rotary Engine | rotary steam engines |
