David K. Lambert
104Patents
25h-index
87Co-inventors
93Inventor score
Filing activity: Jul 22, 1982 → Feb 19, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8466438B2 | System and method of using fluorescent material to display information on a vehicle window | Performing Operations; Transporting | 238 | Active |
| US8019076B1 | Portable speakerphone device and subsystem utilizing false doubletalk detection | Electricity | 118 | Active |
| US6724324B1 | Capacitive proximity sensor | Electricity | 94 | Expired |
| US4576050A | Thermal diffusion fluid flow sensor | Physics | 82 | Expired |
| US9226088B2 | Methods and apparatuses for multiple configurations of beamforming microphone arrays | Electricity | 81 | Active |
| US5239860A | Sensor for measuring alcohol content of alcohol/gasoline fuel mixtures | Physics | 64 | Expired |
| US5262645A | Sensor for measuring alcohol content of alcohol gasoline fuel mixtures | Physics | 60 | Expired |
| US5243858A | Fluid flow sensor with thermistor detector | Physics | 57 | Expired |
| US9813806B2 | Integrated beamforming microphone array and ceiling or wall tile | Electricity | 55 | Active |
| US10728653B2 | Ceiling tile microphone | Electricity | 49 | Active |
| US9635186B2 | Conferencing apparatus that combines a beamforming microphone array with an acoustic echo canceller | Electricity | 47 | Active |
| US9264553B2 | Methods and apparatuses for echo cancelation with beamforming microphone arrays | Electricity | 46 | Active |
| US8077857B1 | Portable speakerphone device with selective mixing | Electricity | 44 | Active |
| US9866952B2 | Conferencing apparatus that combines a beamforming microphone array with an acoustic echo canceller | Electricity | 44 | Active |
| US9641688B2 | Conferencing apparatus with an automatically adapting beamforming microphone array | Electricity | 44 | Active |
| US9854101B2 | Methods and apparatuses for echo cancellation with beamforming microphone arrays | Electricity | 41 | Active |
| US8644525B2 | Virtual microphones in electronic conferencing systems | Electricity | 41 | Active |
| US8290142B1 | Echo cancellation in a portable conferencing device with externally-produced audio | Electricity | 38 | Active |
| US8654955B1 | Portable conferencing device with videoconferencing option | Electricity | 36 | Active |
| US9294839B2 | Augmentation of a beamforming microphone array with non-beamforming microphones | Electricity | 36 | Active |
| US9215327B2 | Methods and apparatuses for multi-channel acoustic echo cancelation | Electricity | 35 | Active |
| US9232185B2 | Audio conferencing system for all-in-one displays | Electricity | 34 | Active |
| US5431042A | Engine emissions analyzer | Physics | 32 | Expired |
| US8031853B2 | Multi-pod conference systems | Electricity | 31 | Active |
| US7095501B2 | Ethyl alcohol sensor and method of use | Physics | 26 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.