Interactive viewgraph system
US4503468A · kind A · utility
37Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1981 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Oct 9, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/42
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
At each of a pair of linked terminals, an image is generated at local and remote input devices. The generated image is projected onto a viewing screen and, while exhibited, further locally or remotely generated data is used to alter the generated image and, consequently, to alter the projected image. Data can, for example, be generated by means of a document scanner and a manually operated X-Y pen digitizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.