Keyboard calculator system
US6114977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q40/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A keyboard for use with a computer. The keyboard has an alphanumeric keypad with alphanumeric keys, a calculator keypad with calculator keys including numeric and arithmetic keys which also function as the standard number pad on a calculator, a keypad matrix, a processor and a bi-directional communications interface. The processor, through the keypad matrix, receives signals indicating actuation of the keys, resolves keystrokes corresponding to the actuated keys, and sends the keystrokes to the computer through the communications interface. The keyboard has a tape mode, a calculator mode and a keyboard mode. The processor, keyboard matrix and calculator keypad act as a discrete calculator when in calculator mode. There is a send key for sending a number active in the calculator to the computer as a series of keystrokes for display on the monitor. In tape mode, the processor sends keystrokes to the computer corresponding to intermediate steps in calculations entered at the calculator keypad. The keyboard has its own LCD display for displaying the calculations of the calculator. There is a software program for use on the computer to display a display window on the monitor. A signal i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.