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| All Patents in class 418/206.5 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 18,986 | Dec. 29, 1857 | O. Palmer | Rotary pump | |
 | 30,157 | Sep. 25, 1860 | P.H. Roots | Blower | |
 | 45,749 | Jan. 03, 1865 | R. Porter | Improvement in fan-blowers | |
 | 53,915 | Apr. 10, 1866 | H.J. Behrens | Rotary Steam Engine | |
 | 56,614 | Jul. 24, 1866 | P.H. Roots, F.M. Roots | Improvement in cross-heads for blowers | |
 | RE2,369 | Oct. 02, 1866 | P.H. Roots | Improvement in blowers | |
 | 77,373 | Apr. 28, 1868 | D.D. Hardy | Rotary Engine | |
 | 178,829 | Jun. 13, 1876 | B. Fitts | Improvement in water-meters | |