Assignee
AMERICAN TECH CORP
US·57 granted patents·18 pending applications·3,269 citations·filing 1976–2007
Top patents by PatentIndex Score
75 records- 0198US5859915ALighted enhanced bullhornAMERICAN TECH CORP·Filed 1997·Granted Jan 12, 1999·173 cites·31 claims
- 0296US6389146B1Acoustically asymmetric bandpass loudspeaker with multiple acoustic filtersAMERICAN TECH CORP·Filed 2000·Granted May 14, 2002·123 cites·34 claims
- 0396US4149178APattern generating system and methodAMERICAN TECH CORP·Filed 1976·Granted Apr 10, 1979·247 cites·33 claims
- 0493US7109789B2Modulator—amplifierAMERICAN TECH CORP·Filed 2003·Granted Sep 19, 2006·76 cites·39 claims
- 0593US6229899B1Method and device for developing a virtual speaker distant from the sound sourceAMERICAN TECH CORP·Filed 1998·Granted May 8, 2001·146 cites·14 claims
- 0693US5889870AAcoustic heterodyne device and methodAMERICAN TECH CORP·Filed 1996·Granted Mar 30, 1999·152 cites·6 claims
- 0793US5689269AGPS relative position detection systemAMERICAN TECH CORP·Filed 1995·Granted Nov 18, 1997·233 cites·13 claims
- 0892US5885129ADirectable sound and light toyAMERICAN TECH CORP·Filed 1997·Granted Mar 23, 1999·71 cites·31 claims
- 0992US5781150AGPS relative position detection systemAMERICAN TECH CORP·Filed 1995·Granted Jul 14, 1998·195 cites·13 claims
- 1092US4539708AEar radioAMERICAN TECH CORP·Filed 1983·Granted Sep 3, 1985·97 cites·15 claims
- 1191US7596229B2Parametric audio system for operation in a saturated air mediumAMERICAN TECH CORP·Filed 2005·Granted Sep 29, 2009·25 cites·17 claims
- 1291US7162042B2Modulator processing for a parametric speaker systemAMERICAN TECH CORP·Filed 2003·Granted Jan 9, 2007·52 cites·58 claims
- 1390US6584205B1Modulator processing for a parametric speaker systemAMERICAN TECH CORP·Filed 1999·Granted Jun 24, 2003·105 cites·18 claims
- 1490US6577738B2Parametric virtual speaker and surround-sound systemAMERICAN TECH CORP·Filed 2001·Granted Jun 10, 2003·52 cites·12 claims
- 1590US5952959AGPS relative position detection systemAMERICAN TECH CORP·Filed 1998·Granted Sep 14, 1999·139 cites·13 claims
- 1689US7729498B2Modulator processing for a parametric speaker systemAMERICAN TECH CORP·Filed 2007·Granted Jun 1, 2010·18 cites·18 claims
- 1788US6704426B2Loudspeaker systemAMERICAN TECH CORP·Filed 2001·Granted Mar 9, 2004·45 cites·33 claims
- 1887US7319763B2Power amplification for parametric loudspeakersAMERICAN TECH CORP·Filed 2001·Granted Jan 15, 2008·40 cites·24 claims
- 1987US6044160AResonant tuned, ultrasonic electrostatic emitterAMERICAN TECH CORP·Filed 1998·Granted Mar 28, 2000·60 cites·21 claims
- 2086US7564981B2Method of adjusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including sameAMERICAN TECH CORP·Filed 2004·Granted Jul 21, 2009·35 cites·23 claims
- 2185US6934402B2Planar-magnetic speakers with secondary magnetic structureAMERICAN TECH CORP·Filed 2002·Granted Aug 23, 2005·33 cites·47 claims
- 2285US6011855APiezoelectric film sonic emitterAMERICAN TECH CORP·Filed 1997·Granted Jan 4, 2000·84 cites·25 claims
- 2383US7376236B1Piezoelectric film sonic emitterAMERICAN TECH CORP·Filed 2000·Granted May 20, 2008·34 cites·42 claims
- 2483US6393129B1Paper structures for speaker transducersAMERICAN TECH CORP·Filed 1999·Granted May 21, 2002·85 cites·40 claims
- 2582US7103193B2Bandpass woofer enclosure with multiple acoustic fibersAMERICAN TECH CORP·Filed 2001·Granted Sep 5, 2006·29 cites·27 claims
- 2681US7298853B2Parametric virtual speaker and surround-sound systemAMERICAN TECH CORP·Filed 2002·Granted Nov 20, 2007·21 cites·11 claims
- 2781US7224808B2Dynamic carrier system for parametric arraysAMERICAN TECH CORP·Filed 2002·Granted May 29, 2007·23 cites·26 claims
- 2881US6151398AMagnetic film ultrasonic emitterAMERICAN TECH CORP·Filed 1998·Granted Nov 21, 2000·58 cites·28 claims
- 2980US7142688B2Single-ended planar-magnetic speakerAMERICAN TECH CORP·Filed 2002·Granted Nov 28, 2006·24 cites·62 claims
- 3079US7343017B2System for playback of pre-encoded signals through a parametric loudspeaker systemAMERICAN TECH CORP·Filed 2002·Granted Mar 11, 2008·20 cites·35 claims
- 3179US6925187B2Horn array emitterAMERICAN TECH CORP·Filed 2001·Granted Aug 2, 2005·19 cites·36 claims
- 3279US4093960ATest signal generating system and methodAMERICAN TECH CORP·Filed 1976·Granted Jun 6, 1978·25 cites·37 claims
- 3378US6606389B1Piezoelectric film sonic emitterAMERICAN TECH CORP·Filed 1999·Granted Aug 12, 2003·56 cites·4 claims
- 3477US7224219B2Modulator-amplifierAMERICAN TECH CORP·Filed 2006·Granted May 29, 2007·9 cites·20 claims
- 3577US6535612B1Electroacoustic transducer with diaphragm securing structure and methodAMERICAN TECH CORP·Filed 1999·Granted Mar 18, 2003·63 cites·70 claims
- 3675US6108433AMethod and apparatus for a magnetically induced speaker diaphragmAMERICAN TECH CORP·Filed 1998·Granted Aug 22, 2000·42 cites·32 claims
- 3774US7298852B2Dynamic power sharing in a multi-channel sound systemAMERICAN TECH CORP·Filed 2001·Granted Nov 20, 2007·12 cites·43 claims
- 3873US6188772B1Electrostatic speaker with foam statorAMERICAN TECH CORP·Filed 1998·Granted Feb 13, 2001·50 cites·53 claims
- 3973US5966452ASound reduction method and system for jet enginesAMERICAN TECH CORP·Filed 1997·Granted Oct 12, 1999·39 cites·28 claims
- 4072US6359990B1Parametric ring emitterAMERICAN TECH CORP·Filed 1998·Granted Mar 19, 2002·48 cites·28 claims
- 4172US6169811B1Bandpass loudspeaker systemAMERICAN TECH CORP·Filed 1999·Granted Jan 2, 2001·50 cites·37 claims
- 4271US6760455B2Electrostatic loudspeaker with a distributed filterAMERICAN TECH CORP·Filed 2001·Granted Jul 6, 2004·15 cites·16 claims
- 4371US6628791B1Signal derived bias supply for electrostatic loudspeakersAMERICAN TECH CORP·Filed 1999·Granted Sep 30, 2003·41 cites·15 claims
- 4471US6016351ADirected radiator with modulated ultrasonic soundAMERICAN TECH CORP·Filed 1997·Granted Jan 18, 2000·39 cites·34 claims
- 4571US5313663AEar mounted RF receiverAMERICAN TECH CORP·Filed 1992·Granted May 17, 1994·46 cites·18 claims
- 4668US7251342B2Single end planar magnetic speakerAMERICAN TECH CORP·Filed 2001·Granted Jul 31, 2007·16 cites·19 claims
- 4768US7158646B2Signal derived bias supply for electrostatic loudspeakersAMERICAN TECH CORP·Filed 2003·Granted Jan 2, 2007·11 cites·25 claims
- 4868US6201874B1Electrostatic transducer with nonplanar configured diaphragmAMERICAN TECH CORP·Filed 1998·Granted Mar 13, 2001·41 cites·36 claims
- 4965US6466674B1Method and apparatus for eliminating audio feedbackAMERICAN TECH CORP·Filed 2000·Granted Oct 15, 2002·9 cites·23 claims
- 5064US6850623B1Parametric loudspeaker with improved phase characteristicsAMERICAN TECH CORP·Filed 1999·Granted Feb 1, 2005·28 cites·34 claims
Showing the top 50 of 75 patent records by PatentIndex Score.
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