Electronic calculation/memorandum apparatus
US4279022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1980 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/0266
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic calculation/memorandum apparatus comprises: a main memory; a key input unit including character keys, numerical keys, symbol keys, and a character mode selection key, a data write-in key for the main memory, and a data read-out key for the main memory; means for setting the main memory to a write mode through the operation of the write-in key; means for writing index data including characters and/or symbols inputted from the key input unit and numerical data associated with the index data in the order of inputting of them into the input key, into the main memory successively from the head address and the succeeding ones; means for alternately reading out all the index data and numerical data stored in the main memory in the order of the writing thereof in the read-out mode and for displaying them; means for retrieving the numerical data corresponding to the index data inputted from the main memory and for displaying it; and a unit for performing calculation on the basis of numerical data inputted through the operation of the numerical key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.