Patent search ap:("ALUMINUM CO OF AMERICA") AND inv:"LEE HAISLIP ROBERT" Page 1

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发明授权
Crust breaking apparatus 失效
Title translation: 地壳破碎装置

公开(公告)号：US2423787A

公开(公告)日：1947-07-08

申请号：US56143444

申请日：1944-11-01

Applicant: ALUMINUM CO OF AMERICA

Inventor： LEE MOSENA ROSCOE , HAMILTON TRAYLOR GEORGE , LEE HAISLIP ROBERT , EARL HALL ALVIN

IPC: B25D17/32 , C25C3/14

CPC classification number: B25D17/32 , C25C3/14

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