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发明名称
Power-operating means for toothbrushes
摘要
申请公布号
US2372731(A)
申请公布日期
1945.04.03
申请号
US19430497712
申请日期
1943.08.06
申请人
CONRAD D. MASTRUD
发明人
NALBACH JOHN R.;GRESHAM WILLIAM F.
分类号
A61C17/40
主分类号
A61C17/40
代理机构
代理人
主权项
地址
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