Electric apparatus having visual indicator means
US6850776B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Sep 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/737
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electric device includes a housing having an indicator window and a visual indicator adapted to emit a visible light signal through the indicator window for indicating a status of the device. The device also has at least one of the following components, which are operative within a first spectral range of light substantially covering red or infrared light: an IR transmitter for transmitting infrared light, an IR receiver for receiving infrared light, an electronic component sensitive to infrared light, or an optical detector susceptible of infrared or red light. The visible light signal is provided within a second spectral range, which substantially covers blue light and is outside the first spectral range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.