Patent search ap:("NORTHROP CORP") AND inv:"MONTGOMERY ROBERT L" Page 1

1.

发明授权
Combination punch press die 失效
Title translation: 组合冲压模具

公开(公告)号：US3400438A

公开(公告)日：1968-09-10

申请号：US60363466

申请日：1966-12-21

Applicant: NORTHROP CORP

Inventor： MONTGOMERY ROBERT L

IPC: B21F45/00 , B21G3/28 , B21G3/32 , B21J13/02

CPC classification number: B21F99/00 , B21F45/00 , B21G3/28 , B21G3/32 , B21J9/10 , B21J13/03 , F42B6/003

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