Dialing tone generation
US4644476A · kind A · utility
1Cited by
5References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/4575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The manner of configuring a voice synthesizer to cause it to emit standard dialing signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.