| Patents for Pratt, Read & Co. |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 156,498 | Nov. 03, 1874 | M. Pratt | Improvement in machines for trimming keys of musical instruments |
 | 162,417 | Apr. 20, 1875 | M. Pratt | Improvement in devices for shaping piano-keys |
 | 162,987 | May 04, 1875 | S.H. Wilder | Mortising machine for piano buttons |
 | RE6,455 | May 25, 1875 | M. Pratt | Improvement in machines for trimming keys of musical instruments |
 | 168,696 | Oct. 11, 1875 | M.G. Wilder, S.H. Wilder, W.H. McNeil, H.C. Tyler | Improvement in mortising machines |
 | 168,862 | Oct. 19, 1875 | M.G. Wilder, W.H. McNeil, H.C. Tyler | Improvement in boring-machines |
 | 182,224 | Sep. 12, 1876 | C.W. Pratt | Improvement in power hand-drill stocks |
 | 195,902 | Oct. 09, 1877 | M. Pratt | Improvement in machines for smoothing ivory key-boards |
 | 195,911 | Oct. 09, 1877 | W.H. McNeil, M.G. Wilder | Improvement in machines for dressing piano-keys |
