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公开(公告)号：US1663526A
公开(公告)日：1928-03-20
申请号：US71413024
申请日：1924-05-17
Applicant: PROSPERITY CO INC
Inventor： STODDARD HART A
IPC: D06F71/04
CPC classification number: D06F71/046
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公开(公告)号：US1663527A
公开(公告)日：1928-03-20
申请号：US725525
申请日：1925-02-06
Applicant: PROSPERITY CO INC
Inventor： STODDARD HART A
IPC: D06F71/04
CPC classification number: D06F71/046
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