VXi Corporation
14Patents
2Active
14Granted
33Portfolio score
Filing activity: May 17, 1993 → Feb 20, 2015
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6453281B1 | Portable audio database device with icon-based graphical user-interface | Physics | 391 | Expired |
| US5544243A | Telephone headset interface circuit | Electricity | 42 | Expired |
| US6137879A | Computer telephony headset amplifier | Electricity | 29 | Expired |
| US9398361B1 | Headset system with user-configurable function button | Electricity | 25 | Active |
| US6731751B1 | Apparatus for cordless computer telephony | Electricity | 18 | Expired |
| US6504937B1 | Amplifier circuit for electret microphone with enhanced performance | Electricity | 17 | Expired |
| US6580797B1 | Amplifier circuit for electret microphone with enhanced performance | Electricity | 13 | Expired |
| US5978491A | Circuitry for improving performance of electret microphone | Electricity | 10 | Expired |
| US5623544A | Telephone headset interface circuit | Electricity | 9 | Expired |
| US6681020B1 | Microphone circuit with mute and keep alive function | Electricity | 9 | Expired |
| US6128384A | Self configuring telephone headset amplifier | Electricity | 9 | Expired |
| US6266424A | Electret microphone circuit with low battery disable | Electricity | 6 | Expired |
| US9413790B2 | Computer telephony headset with presence indicator | Electricity | 3 | Active |
| US7187768B1 | Apparatus for cord-free hands-free telephony | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.