Earphone-microphone adapter
US6198821A · kind A · utility
32Cited by
1References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adapter for connecting an earphone-microphone set to a mobile telephone such that a muting function is added to the system. Moreover, an older earphone-microphone set can also be connected to a mobile telephone via this adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.