Inventor · disambiguated record
David F. Johnston
Also filed as: JOHNSTON DAVID · JOHNSTON DAVID F · JOHNSTON DAVID FULTON
37 granted patents·3 pending applications·976 citations·filing 1982–2019
98Inventor score
Files withGEN ELECTRIC7VOICE SIGNAL TECHNOLOGIES INC7BHA GROUP HOLDINGS INC6JOHNSTON DAVID F4BHA GROUP INC3
Top patents by PatentIndex Score
40 records- 0196US4521659AInduction heating gunNASA·Filed 1983·Granted Jun 4, 1985·140 cites·6 claims
- 0291US7225130B2Methods, systems, and programming for performing speech recognitionVOICE SIGNAL TECHNOLOGIES INC·Filed 2002·Granted May 29, 2007·99 cites·18 claims
- 0389US7313526B2Speech recognition using selectable recognition modesVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted Dec 25, 2007·68 cites·25 claims
- 0488US7526431B2Speech recognition using ambiguous or phone key spelling and/or filteringVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted Apr 28, 2009·66 cites·22 claims
- 0586US8007566B2Electrostatic precipitator having a spark current limiting resistors and method for limiting sparkingBABCOCK & WILCOX POWER GENERAT·Filed 2010·Granted Aug 30, 2011·12 cites·5 claims
- 0683US5068811AElectrical control system for electrostatic precipitatorBHA GROUP INC·Filed 1990·Granted Nov 26, 1991·53 cites·73 claims
- 0782US7577569B2Combined speech recognition and text-to-speech generationVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted Aug 18, 2009·41 cites·33 claims
- 0882US6611440B1Apparatus and method for filtering voltage for an electrostatic precipitatorBHA GROUP HOLDINGS INC·Filed 2002·Granted Aug 26, 2003·39 cites·22 claims
- 0981US7809574B2Word recognition using choice listsVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted Oct 5, 2010·38 cites·38 claims
- 1081US5374809AInduction heating coupler and annealerUS ARMY·Filed 1993·Granted Dec 20, 1994·51 cites·6 claims
- 1181US4891591ANonintrusive method and apparatus for monitoring the cure of polymeric materialsNASA·Filed 1988·Granted Jan 2, 1990·45 cites·10 claims
- 1280US8000102B2Apparatus and arrangement for housing voltage conditioning and filtering circuitry components for an electrostatic precipitatorBABCOCK & WILCOX POWER GENERAT·Filed 2009·Granted Aug 16, 2011·14 cites·28 claims
- 1380US4860149AElectronic precipitator controlNASA·Filed 1986·Granted Aug 22, 1989·43 cites·3 claims
- 1478US7562556B2Cleaning system and method for continuous emissions monitoring equipmentGEN ELECTRIC·Filed 2006·Granted Jul 21, 2009·6 cites·12 claims
- 1577US7505911B2Combined speech recognition and sound recordingROTH DANIEL L·Filed 2004·Granted Mar 17, 2009·28 cites·21 claims
- 1675US8404020B2Systems and methods for monitoring a rapping processFARMER TERRY LEWIS·Filed 2008·Granted Mar 26, 2013·8 cites·9 claims
- 1774US7704302B2Electrostatic precipitator having a spark current limiting resistors and method for limiting sparkingGEN ELECTRIC·Filed 2007·Granted Apr 27, 2010·7 cites·14 claims
- 1873US7716058B2Speech recognition using automatic recognition turn offVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted May 11, 2010·20 cites·29 claims
- 1973US6540812B2Method and system for improved rapper controlBHA GROUP HOLDINGS INC·Filed 2001·Granted Apr 1, 2003·32 cites·21 claims
- 2071US7634403B2Word recognition using word transformation commandsVOICE SIGNAL TECHNOLOGIES INC·Filed 2004·Granted Dec 15, 2009·18 cites·20 claims
- 2171US7452403B2System and method for applying partial discharge analysis for electrostatic precipitatorGEN ELECTRIC·Filed 2005·Granted Nov 18, 2008·5 cites·26 claims
- 2268US8356588B2System and method for controlling combustionGEN ELECTRIC·Filed 2010·Granted Jan 22, 2013·2 cites·20 claims
- 2367US7837749B2System and method for monitoring impact machineryGEN ELECTRIC·Filed 2006·Granted Nov 23, 2010·4 cites·7 claims
- 2467US4605424AMethod and apparatus for controlling power to an electronic precipitatorJOHNSTON DAVID F·Filed 1984·Granted Aug 12, 1986·21 cites·9 claims
- 2566US6839251B2Apparatus and method for filtering voltage for an electrostatic precipitatorBHA GROUP HOLDINGS INC·Filed 2003·Granted Jan 4, 2005·17 cites·17 claims
- 2665US6628568B1System and method for verification of acoustic horn performanceBHA GROUP HOLDINGS INC·Filed 2002·Granted Sep 30, 2003·10 cites·34 claims
- 2762US8409327B2Control of grounded surface geometry in electrostatically enhanced fabric filtersTAYLOR ROBERT·Filed 2010·Granted Apr 2, 2013·1 cites·18 claims
- 2860US2008113580A1Connectable blocksJAKKS PACIFIC INC·Filed 2007·Application pending·0 cites
- 2959US5173867AMultiple rapper control for electrostatic precipitatorBHA GROUP INC·Filed 1990·Granted Dec 22, 1992·23 cites·41 claims
- 3058US5950441AMethod and apparatus for controlling an evaporative gas conditioning systemBHA GROUP HOLDINGS INC·Filed 1997·Granted Sep 14, 1999·18 cites·17 claims
- 3153US5515262AVariable inductance current limiting reactorHITRAN CORP·Filed 1994·Granted May 7, 1996·22 cites·7 claims
- 3249US5705923AVariable inductance current limiting reactor control system for electrostatic precipitatorBHA GROUP INC·Filed 1992·Granted Jan 6, 1998·14 cites·14 claims
- 3347US11303232B2Fan brake control systemBABCOCK & WILCOX SPIG INC·Filed 2019·Granted Apr 12, 2022·0 cites·19 claims
- 3447US2009139406A1Discharge electrode and method for enhancement of an electrostatic precipitatorGEN ELECTRIC·Filed 2008·Application pending·0 cites
- 3546US7655068B2Method and systems to facilitate improving electrostatic precipitator performanceGEN ELECTRIC·Filed 2007·Granted Feb 2, 2010·0 cites·14 claims
- 3641US2007151448A1Discharge electrode and method for enhancement of an electrostatic precipitatorTAYLOR ROBERT·Filed 2006·Application pending·0 cites
- 3735US4483073AHi jump step saver standardJOHNSTON DAVID F·Filed 1982·Granted Nov 20, 1984·4 cites·7 claims
- 3832US5890369AMethod for controlling an evaporative gas conditioning systemBHA GROUP HOLDINGS INC·Filed 1998·Granted Apr 6, 1999·4 cites·1 claims
- 3929US4470595AHi-jackJOHNSTON DAVID F·Filed 1982·Granted Sep 11, 1984·2 cites·11 claims
- 4029US4468024AVaulting pole end plugJOHNSTON DAVID F·Filed 1982·Granted Aug 28, 1984·1 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →