Teaching and entertainment device
US4492582A · kind A · utility
40Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1981 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Jan 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B7/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A teaching and entertainment device includes a desk-top console which supports a keyboard, an LCD display matrix, and a plug-in cartridge recepticle. A quartet of LCD drivers each control a quadrant of the display under the control of a first microprocessor. A plug-in cartridge is insertable into the console and contains a second microprocessor. Apparatus are provided for establishing a master/servant relationship of the second microprocessor over the first whenever the plug-in cartridge is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.