Luminous electric sign
US6675515B2 · kind B2 · utility
21Cited by
24References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jun 9, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/812
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A luminous electric display unit is disclosed in which glass tubing containing inert gas such as neon is entirely or substantially enclosed within a protective housing, thereby providing protection both for the glass tubing and the public.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.