Toothbrush
US6330730A · kind A · utility
17Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B15/0002
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A toothbrush incorporating an indicator comprising a pressure indicating material which provides an optical signal without the provision of a power supply. Preferably, the pressure sensitive material is a piezochromic material, such as a liquid crystal cholesterol ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.