Electronic equipment having a second function keying system
US4481598A · kind A · utility
22Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/0258
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electric equipment such as a desk-top calculator having a unit conversion function is disclosed. In addition to a main-display for displaying input numeric data and results of operations, a sub-display is provided on a keyboard to display functions assigned to keys in a second function mode and then display a selected one of the functions. By watching the sub-display, an operator can identify the function for which a unit conversion operation was carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.