Light emitting devices
US4947475A · kind A · utility
6Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Feb 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device in which annular self luminous light sources are supported intermediate the ends of a resilient rod. In an illustrated embodiment a plurality of the rods are located concentrically within a transparent tube between end caps which close the ends of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.