| All Patents in class 417/183 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 27,979 | Apr. 24, 1860 | H. Giffard | Improved feed-water apparatus for steam-boilers | feedwater apparatus |
| 37,542 | Jan. 27, 1863 | N. Cope | Improvement in Giffard's injector | feedwater apparatus |
| 39,313 | Jul. 21, 1863 | W. Sellers | Improvement in the Giffard injector | feedwater apparatus |
| 536,415 | Mar. 26, 1895 | J.L. Bogert | Vacuum-pump | |
| 649,672 | May 15, 1900 | H.E. Parson | Injector for Portable Forges | forge blowers |
| 1,111,343 | Sep. 22, 1914 | W.E. Wollheim | Jet Pump Apparatus | steam pumps |
| 1,133,601 | Mar. 30, 1915 | R. Wood | Ejecting Device | feedwater apparatus |
