Picture screen
US4169658A · kind A · utility
20Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1978 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Jan 24, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A picture screen comprising an upright standard, a leg unit supporting the standard, a roller adapted to receive a picture screen, a picture screen mounted on the roller and adapted to be unwound from a closed position to an open position, an elongated screen casing for receiving the roller and the screen coupled to the upright standard, and casing extensions integrally formed with the screen casing and each being provided with a speaker mounted therein. The speakers project the sound toward the viewer/listener to provide a lifelike effect with the picture projected on the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.