| Patents for Milon Pratt |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 141,380 | Jul. 29, 1873 | M. Pratt | Improvement in machines for shaping piano-keys |
 | 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 |
 | RE6,455 | May 25, 1875 | M. Pratt | Improvement in machines for trimming keys of musical instruments |
 | 165,024 | Jun. 29, 1875 | M. Pratt | Improvement in the manufacture of key-boards for organs, etc. |
 | 170,394 | Nov. 23, 1875 | M. Pratt | Improvement in machines for slotting and drilling clothes-clamps |
 | 195,902 | Oct. 09, 1877 | M. Pratt | Improvement in machines for smoothing ivory key-boards |
