| All Patents in class 417/440 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 627,850 | Jun. 27, 1899 | F.G. Hobart | Compression Controller |
| | 714,295 | Nov. 25, 1902 | A. Giesler | Relief Valve for Air Compressors |
| | 728,628 | May 19, 1903 | C. Seymour | Hydraulic Press |
| | 940,703 | Nov. 23, 1909 | N. McCarty | Pump |
| | 1,460,875 | Jul. 03, 1923 | A. White | Rotary gear pump |
| | 1,904,115 | Apr. 18, 1933 | C.F. Bacon | Hydraulic jack |
 | 2,214,257 | Sep. 10, 1940 | E.M. Pfauser | Hydraulic Power Unit |
| | 2,277,256 | Mar. 24, 1942 | E. Pfauser | Hydraulic Apparatus |
| | 2,299,492 | Oct. 20, 1942 | E.M. Pfauser | Pump Assembly |
| | 2,348,412 | May 09, 1944 | E.M. Pfauser | Pump Assemblage |
