| Patents for Harold Serrell |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
 | 98,028 | Dec. 21, 1869 | J. Dickinson, E.D. Dickinson, G.T. Chattaway | Grinding Machine |
 | D3,994 | Apr. 26, 1870 | E. Moore | Design for the Shape of the Slots Between Saw-Teeth |
 | 113,048 | Mar. 28, 1871 | P.J. Hardy | Improvement in turning-lathes |
 | 144,155 | Oct. 28, 1873 | M. Stephens | Improvement in rotary shears for metal |
 | 163,341 | May 18, 1875 | M. Stephens | Improvement in devices for connecting, holding, and punching sections of sheet-metal pipe |
 | 184,804 | Nov. 28, 1876 | F.A. Stohlmann | Improvement in surgical saws |
 | 186,779 | Jan. 30, 1877 | H. Winter | Improvement in wood-bending machines |
 | 232,892 | Oct. 05, 1880 | G.A. Hickcox | Vise |
 | 243,480 | Jun. 28, 1881 | W.M. Whiting | Belt Clasp |
 | 310,978 | Jan. 20, 1885 | J.L. Bogert | Rotary valve for steam-engines |
