Hand-held calculator for dimensional calculations
US4744044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Jun 20, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/0258
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The specification discloses a hand-held calculator particularly adapted for dimensional or measurement calculations. The calculator includes keys for indicating a different dimension system (e.g. feet, yards, meters) associated with each number inputted, enabling calculations to be performed on numbers from mixed dimension systems. All inputted measurements are converted to decimal feet internally to simplify calculations and simplify conversion structure and routines. Preferably, a dimension power (e.g. square or cubic) can also be associated with each input number as necessary; and the calculator calculates and displays the proper dimension power resulting from any calculation. Further preferably, the calculator includes a keyboard enabling lumber dimensions to be easily inputted for board feet calculations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.