Overhead Projector with retractable screen
US8899758B2 · kind B2 · utility
0Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2010 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Jul 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This overhead projector comprises:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.