Portable projector screen assembly
US7782531B2 · kind B2 · utility
3Cited by
6References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 29, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/56
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A portable projector screen assembly includes a roller, two cylinders slidably connected to two ends of the roller respectively, a collapsible member connected to the roller, and a screen. The collapsible member includes a plurality of interconnected pieces. Two free ends of the collapsible member are fixed to free ends of the cylinders respectively. The screen includes a plurality of fixing portions, and the fixing portions are respectively connected to joints of each two pieces of the collapsible member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.