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公开(公告)号：US1819061A
公开(公告)日：1931-08-18
申请号：US31209528
申请日：1928-10-12
Applicant: DOOR MOTIVE CORP
Inventor： BANCROFT JAMES E
IPC: H01H50/32
CPC classification number: H01H50/323
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公开(公告)号：US1836059A
公开(公告)日：1931-12-15
申请号：US31209628
申请日：1928-10-12
Applicant: DOOR MOTIVE CORP
Inventor： BANCROFT JAMES E
IPC: E05F15/16
CPC classification number: E05F15/665 , E05Y2201/21 , E05Y2201/434
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公开(公告)号：US1836058A
公开(公告)日：1931-12-15
申请号：US12813626
申请日：1926-08-09
Applicant: DOOR MOTIVE CORP
Inventor： BANCROFT JAMES E
IPC: F15B7/00
CPC classification number: F15B7/00
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