Low profile overhead projector having a foldable post
US6595646B2 · kind B2 · utility
0Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Mar 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S353/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides overhead having (a) a main body having a stage area, (b) a head assembly, and (c) a post suspending the inverted head assembly over the stage area. The post is pivotally attached to the main body in accordance with equationClearance={square root over ((Mx−Px)2+(My−Py)2)}−{square root over ((Fx−Px)2+(Fy−Py)2)}and the post is outside the stage area. In a preferred embodiment, the head assembly is an inverted head assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.