Calculator apparatus with annuity switch for performing begin-and end-period annuity calculations
US4055757A · kind A · utility
32Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1976 |
| Grant date | Oct 25, 1977 |
| Priority date | — |
| Expiry date | Aug 27, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q40/00
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A programmable electronic calculator is provided having a manually operable annuity switch with begin- and end-position settings, enabling a user to specify the type of annuity calculation to be performed. When the switch is set to the begin position, the annuity calculation is performed with payments due at the beginning of each payment period; when the switch is set to the end position, the annuity calculation is performed with payments due at the end of each payment period. The annuity calculation is performed under control of a routine stored in a read-only-memory (ROM) of a data processing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.