Inventor
David Thomson
Inventor
Fremont, CA, US
Overview
Patents· 23 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G10Lprimary
G10LSpeech analysis techniques or speech synthesis36%
G05FSystems for regulating electric or magnetic variables11%
G01KMeasuring temperature7%
G11CStatic stores7%
H04LTransmission of digital information, e.g. telegraphic communication7%
G02BOptical elements, systems or apparatus4%
G04FTime-interval measuring4%
G07CTime or attendance registers4%
H01LSemiconductor devices4%
H03HImpedance networks, e.g. resonant circuits4%
PatentTitleYear
10,991,585Trimming optical device structures20218,761,153'Remote configuration of a voice over internet protocol telephone for smart dial tone'20148,330,393'System for time-sequential LED-string excitation'20127,266,077'Serial digital communication system and method'20077,112,948'Voltage source circuit with selectable temperature independent and temperature dependent voltage outputs'20067,030,641'Programmable fuse state determination system and method'20066,744,885'ASR talkoff suppressor'20046,606,595'HMM-based echo model for noise cancellation avoiding the problem of false triggers'20036,554,469'Four current transistor temperature sensor and method'20036,204,654'Dynamically boosted current source circuit'20016,133,753'Tri-state input detection circuit'20006,055,499'Use of periodicity and jitter for automatic speech recognition'20005,933,045'Ratio correction circuit and method for comparison of proportional to absolute temperature signals to bandgap-based signals'19995,627,867'Watchdog circuit employing minimum and maximum interval detectors'19975,559,514'Analog-to-digital converter with sigma-delta duty cycle encoded output'19965,339,021'Cascaded resistance ladder attenuator network'19945,179,626'Harmonic speech coding arrangement where a set of parameters for a continuous magnitude spectrum is determined by a speech analyzer and the parameters are used by a synthesizer to determine a spectrum which is used to determine senusoids for synthesis'19935,046,100'Adaptive multivariate estimating apparatus'19915,023,910'Vector quantization in a harmonic speech coding arrangement'19915,007,093'Adaptive threshold voiced detector'19914,972,490'Distance measurement control of a multiple detector system'19904,890,328'Voice synthesis utilizing multi-level filter excitation'19894,803,730'Fast significant sample detection for a pitch detector'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1993Patents assigned to AT & T BELL LAB (6)· patent assignee history
1989Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (2)· patent assignee history
1989–1991Based in Warrenville, IL, US· patent location history
1989Based in Aurora, IL, US· patent location history
1991–2014Based in Lisle, IL, US· patent location history
1994–2012Patents assigned to ANALOG DEVICES INC (11)· patent assignee history
1994–2012Based in Fremont, CA, US· patent location history
2000–2004Patents assigned to LUCENT TECHNOLOGIES INC (3)· patent assignee history
2014Patents assigned to DUONG HUNG (1)· patent assignee history
2021Based in Highfield, GB· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ANALOG DEVICES INC | 11 | 1994–2012 |
| AT & T BELL LAB | 6 | 1989–1993 |
| LUCENT TECHNOLOGIES INC | 3 | 2000–2004 |
| AMERICAN TELEPHONE & TELEGRAPH | 2 | 1989 |
| DUONG HUNG | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Fremont, California, US | 11 | 1994–2012 |
| Lisle, Illinois, US | 6 | 1991–2014 |
| Warrenville, Illinois, US | 4 | 1989–1991 |
| Highfield, GB | 1 | 2021 |
| Aurora, Illinois, US | 1 | 1989 |