| Patents for J. N. Campbell |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | RE4,019 | Jun. 07, 1870 | C.Z. Kroh | Improvement in Curtain-Knobs |
 | RE4,085 | Aug. 02, 1870 | B. Holly | Water Supply Regulator for Water Works |
 | RE4,086 | Aug. 02, 1870 | B. Holly | Water Supply Regulator |
 | RE4,087 | Aug. 02, 1870 | B. Holly | Water Supply Regulator |
 | 113,516 | Apr. 11, 1871 | B. Holly | Water Filter |
 | 113,517 | Apr. 11, 1871 | B. Holly | Safety Valve |
 | 113,668 | Apr. 11, 1871 | B. Holly | Surface Condenser |
 | 114,010 | Apr. 25, 1871 | B. Holly | Variable Cut Off |
 | 114,142 | Apr. 25, 1871 | B. Holly | Combined Heaters & Condensers |
 | 116,189 | Jun. 20, 1871 | R. Hines, L. Beyer | Improvement in machines for sharpening saws |
