发明名称 Cheek retractor
摘要 An oval cheek retractor enclosing an oval work area and attached to a handle. The cheek retractor has a pair of lip extenders at either oval end so that the user can either push or pull the cheeks without changing the hand being used.
申请公布号 US4971557(A) 申请公布日期 1990.11.20
申请号 US19890422477 申请日期 1989.10.17
申请人 JOHNSON & JOHNSON CONSUMER PRODUCTS, INC. 发明人 MARTIN, PATRICK E.
分类号 A61B1/24;A61C5/14 主分类号 A61B1/24
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