Brushware – Powered – Electric toothbrush
Patent
1990-06-05
1992-04-07
Lucas, Susan J.
Brushware
Powered
Electric toothbrush
Patent
active
D03251292
REFERENCES:
patent: 2172624 (1939-09-01), Robert
patent: 3104405 (1963-09-01), Perrinjaquet
patent: 3577579 (1971-05-01), Duve et al.
patent: 4827550 (1989-05-01), Graham et al.
Lucas Susan J.
Tabor Lavone D.
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