Computer display for input and display of improper and mixed fractions
US5309380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Jul 29, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/0225
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A calculator keyboard includes various keys such as numeric keys, a mixed fraction key, and a fraction key, a RAM, a ROM and a CPU. A character including a value or variable for a mixed fraction may be input and displayed separately as an integer, a numerator, and a denominator. Any of the characters in the mixed fraction may be edited subsequently. In addition, a fraction may be first input and displayed, and thereafter, an integer of a mixed fraction may be input and displayed. Consequently, unnecessary movement of the cursor is avoided in editing of fractions on the calculator display thereby facilitating easy and efficient operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.