Brushware – Powered – Electric toothbrush
Patent
1986-02-06
1989-10-10
Lucas, Susan J.
Brushware
Powered
Electric toothbrush
Patent
active
D03038769
REFERENCES:
patent: D147151 (1947-07-01), Schinske
patent: D199728 (1964-12-01), Hall
patent: D207094 (1967-03-01), Rakocy
patent: D228983 (1973-11-01), Gerardus
patent: D283374 (1986-04-01), Ng Cheuk-Yiu
patent: 2140307 (1938-12-01), Belaschk et al.
patent: 2598275 (1952-05-01), Lakin
patent: 3277358 (1966-10-01), Nicholl
patent: 4156620 (1979-05-01), Clemens
Clemens George S.
Mackay Spencer L.
Dental Research Corporation
Lucas Susan J.
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