| All Patents in class 251/282 |
Patents 1 -
10
of 18
      |
| Picture | Number | Date | Patentee | Title |
| | 5,540 | Apr. 25, 1848 | W.B. Hill | Balance Valve for Steam Engines |
| | 16,351 | Jan. 06, 1857 | C. Bradley | Steam Balanced Valve |
| | 23,714 | Apr. 19, 1859 | C.A. Schultz | Steam Balanced Valve |
 | 27,381 | Mar. 06, 1860 | J.T. Plass | Slide-valve for steam-engines |
 | 59,848 | Nov. 20, 1866 | J. Lochhead | Improvement in balance slide valves |
 | 69,527 | Oct. 01, 1867 | G. Smith, J.N. Wrigley | Improvement in steam safety-valves |
| | 86,346 | Feb. 02, 1869 | J. Ashcroft | Safety Valve |
 | 172,603 | Jan. 25, 1876 | B. Brazelle | Improvement in balanced slide-valves |
 | 181,334 | Aug. 22, 1876 | L.H. Hall | Improvement in balanced valves |
| | 313,496 | Mar. 10, 1885 | D.C. Harlow | Valve for Steam Engines |
