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公开(公告)号：US742731A
公开(公告)日：1903-10-27
申请号：US1903166552
申请日：1903-07-22
Applicant: PLATO ROBERT
Inventor： PLATO ROBERT
CPC classification number: A42B1/201
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公开(公告)号：US740913A
公开(公告)日：1903-10-06
申请号：US1903160187
申请日：1903-06-05
Applicant: PLATO ROBERT
Inventor： PLATO ROBERT
CPC classification number: A42C5/04
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