Headset amplifier
US5396551A · kind A · utility
24Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Sep 3, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6025
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A headset amplifier, adapted for use with a voltage source such as a battery, includes a time-out-timer circuit for deactivating the headset amplifier after a first predetermined period of time and for reactivating the amplifier in response to a signal fed to an input port of the time-out-timer circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.