| Patents Granted on 1863-04-21 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| RE1,456 | Apr. 21, 1863 | N.W. Spaulding | Improvement in setting teeth in saws and saw-plates | insertable saw teeth |
| RE1,457 | Apr. 21, 1863 | O. Stoddard | Shingle machine | shingle machines |
| 38,226 | Apr. 21, 1863 | J. Holmes | Water Wheel | water wheels |
| 38,249 | Apr. 21, 1863 | A.P. Stephens | Improvement in locks for fire-arms | firearms |
| 38,252 | Apr. 21, 1863 | F.A. Traut | Improvement in Combined Plumb and Levels | inclinometers |
| 38,257 | Apr. 21, 1863 | B.Q. Budding | Improved Rolling or Polishing Machine | shoe and boot making machines |
| 38,264 | Apr. 21, 1863 | W.A. Purves | Improvement in drag-saws | drag saws |
| GB-186,300,945 | Apr. 21, 1863 | L. Schwartzkopff, W.E. Newton | Spanners and Wrenches; Combination Tools | self-adjust wrenches |
| GB-186,300,990 | Apr. 21, 1863 | H.J. Behrens | Improvements in marine steam engine governors | steam engine governors |
