| Patents for S. N. Piper |
Patents 31 -
40
of 40
      |
| Number | Date | Patentee | Title | Type |
| 303,975 | Aug. 26, 1884 | J. Birkenhead | Turret or tool-support | metal lathes |
| 331,951 | Dec. 08, 1885 | F.S. Duell | Wrench | ratchet wrenches |
| 342,923 | Jun. 01, 1886 | F.B. Munroe | Hose Spanner | firehose and hydrant wrenches |
| 345,630 | Jul. 13, 1886 | J.N. Girard | Combined Tool | combination tools |
| 347,884 | Aug. 24, 1886 | J.F. Monaghan | Saw-guard | woodworking machine safety guards |
| 381,525 | Apr. 24, 1888 | A.H. Brainard | Milling Machine | milling machines |
| 383,544 | May 29, 1888 | J. Rose | Pipe Wrench | pipe wrenches |
| 390,402 | Oct. 02, 1888 | J. Rose | Pipe Wrench | pipe wrenches |
| 437,385 | Sep. 30, 1890 | F.J. Smith | Screw-cutting die | taps and dies |
| 472,519 | Apr. 12, 1892 | A.H. Brainard | Gear Cutting Machine | gear making machines |
