Transparency holder for navigation aid
US5339528A · kind A · utility
2Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1990 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Aug 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S353/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transparency holder for use in a navigation device is disclosed. The transparency holder is positioned between a lens and a compass, and is adapted to receive a map transparency in one correct orientation only. The one orientation only feature is achieved by providing certain asymmetric features, such as off-center notches which engage complementary features in the navigation device. In the preferred embodiment, the transparency holder has integral upper and lower halves hinged together by a living hinge and sandwiching the map transparency therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.