Display device and method therefor
US6238122A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Mar 1, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7067
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for display, having a tailpipe attachment piece, adapted for coupling to the exhaust pipe of a vehicle, a receiver piece coupled to the tailpipe attachment piece, wherein the receiver piece is adapted for coupling to a display piece. In one embodiment, a pollution detection device includes a tailpipe attachment piece, a receiver piece coupled to the tailpipe attachment piece, and a chemical indicator coupled to the receiver piece, wherein the chemical indicator is sensitive to the chemistry of emissions. In one embodiment, a method of presenting an advertisement message is provided by attaching the message to the exhaust pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.