US2543599A - Screen structure for hammer mills - Google ...
US2543599A US660256A US66025646A US2543599A US 2543599 A US2543599 A US 2543599A US 660256 A US660256 A US 660256A US 66025646 A US66025646 A US 66025646A US 2543599 A US2543599 A US 2543599A Authority US United States Prior art keywords screen rotor zone hammers opening Prior art date Legal status (The legal status is an assumption and is not a legal …