Brushware – Powered – Electric toothbrush
Patent
1999-05-13
2000-02-22
Douglas, Alan P.
Brushware
Powered
Electric toothbrush
D4138, 0402
Patent
active
D04208013
REFERENCES:
patent: D321285 (1991-11-01), Hirabayashi
patent: D341943 (1993-12-01), Si-Hoe
patent: D361433 (1995-08-01), Yang
patent: 5590434 (1997-01-01), Imai
patent: 5732432 (1998-03-01), Hui
patent: 5778474 (1998-07-01), Shek
Cohen Donald S.
Douglas Alan P.
Tabor Lavone D.
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