Heinrich Hertz Institut fuer Nachrichtentechnik Berlin GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 1197

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6870965 Texture description method and texture-based image retrieval method using Gabor filter in frequency domainDec 04, 00Mar 22, 05[G06K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6233377 Digital optical switchExpiredDec 07, 98May 15, 01[G02B]
6233377 Digital optical switchExpiredDec 07, 98May 15, 01[G02B]
6215918 Thermo-optical switchExpiredJun 19, 98Apr 10, 01[G02B]
6094516 Digital optical switchExpiredOct 02, 97Jul 25, 00[G02B]
6061481 Optoelectronic circuitExpiredDec 19, 97May 09, 00[G02B]
6008931 Optical frequency generatorExpiredOct 20, 97Dec 28, 99[G02F]
5940207 Wavelength converterExpiredDec 30, 97Aug 17, 99[H01S, G02F]
5185645 Measurement method for the determination of low levels of optical absorptionExpiredFeb 21, 91Feb 09, 93[G01N]
5083199 Autostereoscopic viewing device for creating three-dimensional perception of imagesExpiredJun 18, 90Jan 21, 92[H04N]
4954896 Electronic projector system such as a high definition television (HDTV) projection television system or the like having a fluid therein with increased resistance to damage from projection system radiationExpiredFeb 01, 90Sep 04, 90[H04M]
4650929 Communication system for videoconferencingExpiredFeb 28, 85Mar 17, 87[H04N]
4612174 Method of removing noxious substances from gasesExpiredNov 13, 84Sep 16, 86[B01D]
4530084 Communications network with optical channelsExpiredSep 27, 82Jul 16, 85[H04B]
4475173 Multibit unidirectional shifter unitExpiredSep 04, 81Oct 02, 84[G06F]
4351049 Circuit arrangement for user stations in a communications networkExpiredNov 08, 79Sep 21, 82[H04Q, H04J]
4290142 Interactive cable television systemExpiredFeb 22, 79Sep 15, 81[H04B]

Top Inventors for This Owner

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