| Patents for Perley D. Cummings |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 109,591 | Nov. 29, 1870 | P.D. Cummings | Improvement in machines for making key-boards for wood pavements | specialty woodworking machines |
| 110,440 | Dec. 27, 1870 | P.D. Cummings | Improvement in machines for grooving blocks for wood pavements | specialty woodworking machines |
| 139,457 | Jun. 03, 1873 | P.D. Cummings, M. Smith, J.C. Jordan | Improvement in machines for cutting matches | match making machines |
| 145,488 | Dec. 16, 1873 | P.D. Cummings | Grinding Machines | grinders |
