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| All Patents in class 29/447 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,451,891 | Apr. 17, 1923 | T.F. Rataiczak | Meat chopper and method of making same | butcher | |
| 1,814,267 | Jul. 14, 1931 | C.H. Swartz | Cylinder sleeve and method of producing the same | ||
| 2,499,456 | Mar. 07, 1950 | A.A. Browne | Bearing Sleeve for Pump Shafts | centrifugal pumps | |
| 4,460,157 | Jul. 17, 1984 | F.V. Marchal | High Pressure Ball Valve | steam engine valves | |