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| All Patents in class 417/206 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,781,416 | Nov. 11, 1930 | G.D. Sundstrand | Pump | ||
| 2,383,092 | Aug. 21, 1945 | G.A. Wahlmark | Hydraulic circuit | ||
| 2,474,661 | Jun. 28, 1949 | R.H. Shepard, B.E. Folke | Lubricating Device | ||
| 2,766,693 | Oct. 16, 1956 | C.B. Wells | Pump | ||
| 2,892,413 | Jun. 30, 1959 | R.W. Erikson | Anti-hum device | ||
 | 4,120,616 | Oct. 17, 1978 | N.M. Dwyer, J.A. Rasins | Vacuum cleaner-blower assembly with sound absorbing arrangement | |