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1.Surface cleaning apparatus including discardable revolvable head 失效
Title translation: 表面清洁装置,包括可拆卸的可旋转头公开(公告)号:US2740151A
公开(公告)日:1956-04-03
申请号:US34788153
申请日:1953-04-10
Applicant: WAYNE DOUGLAS N
Inventor: WAYNE DOUGLAS N
IPC: A47L1/03
CPC classification number: A47L1/03
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公开(公告)号:US2563696A
公开(公告)日:1951-08-07
申请号:US3945448
申请日:1948-07-19
Applicant: WAYNE DOUGLAS N
Inventor: WAYNE DOUGLAS N
IPC: A47L1/03
CPC classification number: A47L1/03
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