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公开(公告)号:US1963575A
公开(公告)日:1934-06-19
申请号:US58551332
申请日:1932-01-08
Applicant: ALEXANDER JOHN M
Inventor: ALEXANDER JOHN M
IPC: G07F13/02
CPC classification number: G07F13/02
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公开(公告)号:US1201422A
公开(公告)日:1916-10-17
申请号:US1914844537
申请日:1914-06-11
Applicant: ALEXANDER JOHN M
Inventor: ALEXANDER JOHN M
CPC classification number: B61G3/04
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