NCT GROUP, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16M FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACHINES OR APPARATUS, NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS OR SUPPORTS134
 
  
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 196

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5768473 Adaptive speech filterJan 30, 95Jun 16, 98[G10L]
5251863 Active force cancellation systemAug 12, 92Oct 12, 93[F16M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7103188 Variable gain active noise cancelling system with improved residual noise sensingExpiredMar 08, 99Sep 05, 06[A61F]
6748087 Headset with ear cushion and means for limiting the compression of the cushionExpiredMar 05, 98Jun 08, 04[H03B]
6412593 Cushioned earphonesExpiredSep 15, 00Jul 02, 02[H04R]
2001/0053,228 Noise cancellation system for active headsetsAbandonedJul 23, 01Dec 20, 01[A61F, G10K, H03B]
6147594 Method and apparatus for conveying audiovisual informationExpiredMar 11, 98Nov 14, 00[G08B]
6108610 Method and system for updating noise estimates during pauses in an information signalExpiredOct 13, 98Aug 22, 00[G10L]
6091813 Acoustic echo cancellerExpiredJun 23, 98Jul 18, 00[H04M, H04B]
6069959 Active headsetExpiredApr 30, 97May 30, 00[A61F]
5692054 Multiple source self noise cancellationExpiredJun 30, 95Nov 25, 97[G10K]
5652770 Sampled-data filter with low delayExpiredMar 21, 95Jul 29, 97[G06J]
5638022 Control system for periodic disturbancesExpiredDec 02, 94Jun 10, 97[G10K]
5627746 Low cost controllerExpiredMar 01, 95May 06, 97[G05B, G06F]
5621656 Adaptive resonator vibration control systemExpiredOct 11, 94Apr 15, 97[H03B]
5604813 Industrial headsetExpiredMay 02, 94Feb 18, 97[A61F]
5431008 Active control of machine performanceExpiredAug 20, 92Jul 11, 95[F02C]
5097923 Active sound attenation system for engine exhaust systems and the likeExpiredNov 07, 89Mar 24, 92[F01N]

Top Inventors for This Owner

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