Selective pager and paging system
US6327475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/185
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Group identification codes, names of parties to be sent, and telephone numbers of the pagers of the parties to be sent are stored in groups in memory 3 of a selective pager. At the time of transmission of a message, telephone numbers of a specified group and a message to be sent for the group are selected from the memory. The telephone numbers and the message are alternately sent to a DTMF signal generation section 8, which converts the telephone numbers and the message to DTMF signals. The DTMF signals are then converted into acoustic signals by means of a speaker 9 and are continually transmitted by way of a transmitter of a telephone set. As a result, a group call can be implemented without involving laborious operations, such as transmission of the telephone numbers and the message one by one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.