| Patents for Harry S. Spencer |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 642,178 | Jan. 30, 1900 | J.R. Thomas, H.S. Spencer | Clamping device | work holding |
| 642,645 | Feb. 06, 1900 | J.R. Thomas, H.S. Spencer | Boring-machine | drilling and boring |
| 749,458 | Jan. 12, 1904 | H.S. Spencer | Dovetailing-machine | dovetailing machines |
| 752,313 | Feb. 16, 1904 | J.R. Thomas, H.S. Spencer | Feeding device for woodworking-machines | wood planers |
| 756,725 | Apr. 05, 1904 | H.S. Spencer | Hollow-chisel mortising-machine | mortising machines |
| 767,504 | Aug. 16, 1904 | H.S. Spencer | Mortising-machine | mortising machines |
