发明名称 |
Toothbrush |
摘要 |
A toothbrush incorporates an indicator comprising a pressure indicating material which provides an optical signal without the provision of a power supply and wherein the signal is provided when the correct brushing pressure is being applied. Preferably, the pressure sensitive material is a piezochromic material, such as a liquid crystal cholesterol ester.
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申请公布号 |
US6389636(B1) |
申请公布日期 |
2002.05.21 |
申请号 |
US20000491950 |
申请日期 |
2000.01.26 |
申请人 |
UNILEVER HOME & PERSONAL CARE USA, CO, DIVISION OF CONOPCO, INC. |
发明人 |
SAVILL DEREK GUY |
分类号 |
A46B15/00;(IPC1-7):A46B9/04 |
主分类号 |
A46B15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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