Electronic calculator displaying a partial result obtained from a portion of a numerical expression
US3971924A · kind A · utility
8Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1974 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Apr 30, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic calculator having a pair of parenthesis keys is capable of displaying a temporary partial result obtained from an operation performed on a portion of a numerical expression to be calculated, which portion is included within a pair of parentheses. The partial result may be continuously displayed until the next key operation is executed. A temporary result from an exponent term in an expression is also indicated visually.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.