Toothbrush
US4033008A · kind A · utility
77Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Apr 5, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B2200/1066
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A toothbrush head has two inner longitudinal rows of relatively soft bristle tufts, two outer longitudinal rows of shorter relatively hard bristle tufts, and a transverse end row of hard bristle tufts that are longer than any of the other tufts, and the end surfaces of the bristle tufts of the inner and outer rows are tapered laterally outwardly from an apex of the softer bristles that extends longitudinally medially of the head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.