Patent · US Expired

Electric toothbrush

US4450599A · kind A · utility

70Cited by

2References

12Claims

0Family size

Assignee

Wurttembergische Parfumerie-Fabrik GmbH · DE

Inventors

Hans U. Scheller · Eislingen/Fils, DE
Karl Scheller · Bow, US

Key dates

Filing date	Apr 23, 1982
Grant date	May 29, 1984
Priority date	—
Expiry date	Apr 23, 2002

Classification

Technology area (CPC A)Human Necessities
CPC primaryA46B2200/1066
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An electric toothbrush having a timer for monitoring brushing time. The timer is activated when the pressure exertred on the bristles exceeds a predetermined minimum pressure to ensure proper brushing for a predetermined minimum period of time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.