| All Patents in class 137/557 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 85,792 | Jan. 12, 1869 | G.H. Clemens | Improvement in steam safety-valves |
 | 87,413 | Mar. 02, 1869 | B. Holly | Supply Regulator for Water Works |
 | RE4,085 | Aug. 02, 1870 | B. Holly | Water Supply Regulator for Water Works |
| | RE4,373 | May 09, 1871 | B. Holly | Improvement in Systems of Water-supplies for Cities |
| | RE5,132 | Nov. 05, 1872 | B. Holly | Improvement in Water-Supply Regulators for Water-Works |
 | 217,176 | Jul. 01, 1879 | D. Lang, A. Linn, A.J. Ulscht | Improvement in apparatus for regulating pressure in fermenting-casks |
 | 244,094 | Jul. 12, 1881 | J.W. Thompson | Cylinder for steam-engine indicators |
| | 643,876 | Feb. 20, 1900 | F. Lane | Pressure Gage |
| | 1,954,442 | Apr. 10, 1934 | H. Ernst, A.H. Dall | Grinding Machine |
| | 2,160,137 | May 30, 1939 | A.F. Froussard | Safety Mechanism |
