| All Patents in class 418/206.5 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 18,986 | Dec. 29, 1857 | O. Palmer | Rotary pump | rotary pumps |
| 30,157 | Sep. 25, 1860 | P.H. Roots | Blower | blowers |
| 53,915 | Apr. 10, 1866 | H.J. Behrens | Rotary Steam Engine | rotary steam engines |
| 56,614 | Jul. 24, 1866 | P.H. Roots, F.M. Roots | Improvement in cross-heads for blowers | blowers |
| RE2,369 | Oct. 02, 1866 | P.H. Roots | Improvement in blowers | blowers |
| 77,373 | Apr. 28, 1868 | D.D. Hardy | Rotary Engine | rotary steam engines |
| 178,829 | Jun. 13, 1876 | B. Fitts | Improvement in water-meters | water meters |
