Digital grade averager
US4118783A · kind A · utility
Inventor
Key dates
| Filing date | Feb 7, 1977 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Feb 7, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The apparatus is a calculator for use by teachers which adds letter grades, accompanied, if desired, by plus or minus signs, averages those grades in terms of their numerical equivalents and displays the average grade and also the number of grades averaged. Letter grades are entered from a key board as binary coded digits. Plus and minus signs are assigned a decimal fraction value and are also entered in binary code. The grades so entered are added in a binary coded decimal counter, the outputs of which are returned to the calculator as a divisor and are also passed to binary decoders which drive conventional digital entry display elements. The average grade is displayed by conventional calculator display elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.