Electronic pocket directory
US4117542A · kind A · utility
Inventors
Key dates
| Filing date | Jul 7, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jul 7, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/275
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic pocket directory is of a size and shape to fit in a user's pocket and resembles an electronic pocket calculator in size and appearance. It comprises a case containing read only memory circuit means for programming operation of the instrument and read/write circuit means dedicated to storing and retrieving telephone numbers, street addresses, appointments and agenda. A keyboard on the case comprises alphanumeric keys for numerals 1 to 0 and letters A to Z together with function keys for inputting and fetching the stored information. The information is retrieved visually by means of an alphanumeric display having a capacity of at least 10 and preferably at least 12 letters or numbers and audibly by means of an audio system. The audio system also includes means for producing an audio signal at any preset time, for example to call attention to an appointment and means for producing telephone dialing tones whereby tones representing telephone numbers can be fed directly into the telephone system. The instrument further includes calculating circuit means for performing mathematical calculations and time keeping means for displaying current time and for presetting future tim…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.