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| Number | Title | Issue Date |
| 4465409 | Silo unloader A top unloading silo unloader pendently supported in a tower silo. The unloader has a material collector moved around the silo with leading and trailing drive wheels. An impeller receives material from the collector and throws the material into an out chu... | 08/14/1984 |
| 4329105 | Silo unloader leveling apparatus A top unloading silo unloader pendantly supported in a tower silo. The unloader has a material collector moved around the silo with drive structure. An impeller receives material from the collector and throws the material into an out chute which directs t... | 05/11/1982 |
| 4170385 | Silo unloader with leveling and drive structure A top unloading silo unloader pendantly supported in a tower silo. The unloader has a material collector moved around the silo with an automatic leveling and drive structure. An impeller receives material from the collector and throws the material into an... | 10/09/1979 |
