Television set/calculator interface including exchangeable keyboard panel and program memory cartridge
US4259668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | May 14, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/0225
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A combined home-use-television set/calculator electronic system comprising a control unit for conducting arithmetic calculations and for displaying calculation results on an image screen of the home-use-television set. A keyboard unit is exchangeably connected to the control unit for increasing operation abilities of the combined home-use-television set/calculator electronic system. A read only memory cartridge is exchangeably secured to the control unit. A read only memory corresponding to a selected keyboard unit is secured to the control unit for developing operation instruction signals which are required for performing the arithmetic calculations associated with the selected keyboard unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.