Electronic data processing apparatus with equation operating system having implied multiplication of two hierarchical ranks
US4495592A · kind A · utility
2Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1982 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | May 25, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The equation operating system is an improved data and command entry format together with a compatible operation system for use with electronic data processing apparatuses, most particularly with scientific calculators which provide an alphanumeric display of entered equations. This invention provides an implied multiplication having differing hierarchical ranks when one of a member of a predetermined prefix set entry is followed by one of two differing suffix set entries. Each of these implied multiplications have a differing hierarchical rank than that of explicit multiplication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.