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2917171
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Patent Grant
2917171
References
Source
Patent Number
2,917,171
Date Filed
Not available
Date Issued
Tuesday, December 15, 1959
64 years ago
CPC
B07B13/07 - Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement
B07B13/072 - the openings being rollers with a divergent axis and the material moving substantially along the rollers axis
US Classifications
209 - Classifying, separating, and assorting solids
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