| Patents for S. N. Piper |
Patents 16 -
30
of 41
      |
| Number | Date | Patentee | Title | Type |
| 118,732 | Sep. 05, 1871 | W.A. Long | Improvement in Milling Machines | milling machines |
| 123,546 | Feb. 13, 1872 | H.G. Ashton | Improvement in Lock Safety-Valves for Steam-Boilers | steam safety valves |
| 127,990 | Jun. 18, 1872 | E.H. Rollins | Improvement in machines for squaring the ends of boards | circular crosscut saws |
| 133,521 | Dec. 03, 1872 | A. Dufoult | Shoemaker's Lasting Pincers | cobbler |
| 142,511 | Sep. 02, 1873 | S.W. Putnam, Jr. | Improvement in machines for tapping nuts | nut or bolt making machines |
| 144,862 | Nov. 25, 1873 | L. Pond | Improvement in Hose-Coupling Spanners | firehose and hydrant wrenches |
| 148,300 | Mar. 10, 1874 | H.P. Huntoon | Pipe-Tongs | pipe tongs |
| 156,224 | Oct. 27, 1874 | R. Hunt | Improvement in water-wheels | water wheels |
| 215,479 | May 20, 1879 | N.R. Pratt | Carriage-Wheel Wrench | axle nut wrenches that lock nut to wheel hub |
| 217,658 | Jul. 15, 1879 | H.A. Webber | Coach-Wrench | ratchet wrenches |
| 230,634 | Aug. 03, 1880 | H.P. Huntoon | Pipe Tongs | pipe tongs |
| 261,217 | Jul. 18, 1882 | A.F. Fifield | Pipe Wrench | pipe tongs |
| 264,492 | Sep. 19, 1882 | J.A. Thayer | Claw Hammer and Screw Driver | hammers |
| 269,025 | Dec. 12, 1882 | W.L. Dodge | Gage for cutter-heads | cutterheads |
| 272,573 | Feb. 20, 1883 | P. Mihan | Gas Burner and Pipe Pliers | pliers |
