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公开(公告)号：US1647520A
公开(公告)日：1927-11-01
申请号：US68962424
申请日：1924-01-31
Applicant: HITCHCOCK JOHN L , PANGBORN ARTHUR R
Inventor： HITCHCOCK JOHN L , PANGBORN ARTHUR R
IPC: B60Q1/14
CPC classification number: B60Q1/1484
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