Patent search ap:("ALUMINUM CO OF AMERICA") AND inv:"FRITZLEN THOMAS L" Page 1

1.

发明授权
Method of working aluminum and product thereof 失效
Title translation: 铝及其制品的加工方法

公开(公告)号：US2249353A

公开(公告)日：1941-07-15

申请号：US29153839

申请日：1939-08-23

Applicant: ALUMINUM CO OF AMERICA

Inventor： FRITZLEN THOMAS L

IPC: C22C21/12 , C22F1/04

CPC classification number: C22F1/04 , C22C21/12

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