Reading teaching aid
US6471517B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 17, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jan 17, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B15/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A reading teaching aid comprising two substantially coplanar masking elements each of which defines at least one edge of a viewing area, said elements being carried on the respective first ends of a pair of elongate arms which are resiliently hinged together at their second ends, each of said elongate arms having finger reception means adjacent said masking elements which include a substantially horizontal portion and an upstanding portion to allow said masking elements to be pressed onto a supporting surface and moved towards and away from each other against the resilience of the hinge to vary the dimensions of the viewing area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.