Projection screen system
US6421175B1 · kind B1 · utility
17Cited by
11References
69Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection screen system is provided that is configured to mount to a structure. The projection screen system includes a housing, a roller, a screen, and a motor positioned to rotate the roller to raise and lower the screen. The projection screen system further includes a coupling configured to couple the motor to the electrical supply of the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.