Method for prompting at a digital telephone station
US4776002A · kind A · utility
10Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a method for user prompting at a digital telephone station, comprising a twelve-key keyboard for subscriber selection and further keys, here eight, for subscriber services, and comprising a display for written or oral messages deposited in a mailbox assigned to the telephone station an a one-line or multi-line display, and whereby at least a portion of the keys can be represented on a touch sensitive liquid crystal surface in the form of pictograms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.