Standalone telephone answering machine with store and forward facsimile
US6370239B1 · kind B1 · utility
3Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jul 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0015
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.