THORN EMI PLC, A COMPANY OF GREAT BRITAIN

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 1132
 
  
 
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
5633947 Method and apparatus for fingerprint characterization and recognition using auto correlation patternOct 12, 94May 27, 97[G06K]
RE34690 Display device having a reservoir and a vacuum channel for filling the display region with the liquid crystal materialApr 16, 93Aug 09, 94[G02F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5764411 Apparatus for displaying an imageExpiredAug 09, 93Jun 09, 98[G02B]
5619586 Method and apparatus for producing a directly viewable image of a fingerprintExpiredMay 03, 95Apr 08, 97[G06K]
5306912 Optically addressed thermal imaging deviceExpiredOct 11, 90Apr 26, 94[H01L, G01J, G02B]
5245190 Imaging arrangementExpiredJun 20, 91Sep 14, 93[G01J]
5206145 Method of measuring the concentration of a substance in a sample solutionExpiredAug 23, 91Apr 27, 93[C12Q, G02N]
5193015 Cholesteric liquid crystal screen which reflects substantially all of the projected lightExpiredOct 05, 90Mar 09, 93[G03B, G02F]
5182490 Light sourcesExpiredAug 07, 90Jan 26, 93[H01J]
5177341 Thick film electrically resistive tracksExpiredFeb 24, 88Jan 05, 93[H05B]
5166501 Financial transaction cards having tagging element capable of deactivation by application of personalizing dataExpiredOct 12, 90Nov 24, 92[G08B, B42D, G06K]
5157758 Tungsten halogen lampExpiredNov 13, 90Oct 20, 92[H05B]
5134344 Ballast circuits for gas discharge lampsExpiredApr 13, 90Jul 28, 92[H05B]
5130542 Thermal imaging devicesExpiredNov 21, 89Jul 14, 92[H01L]
5124695 Display deviceExpiredJun 01, 90Jun 23, 92[G09G]
5122944 Mounting arrangement for a lamp fittingExpiredJun 21, 90Jun 16, 92[F21S]
5117157 Ballast circuits for discharge lampsExpiredApr 16, 90May 26, 92[H05B]
5111117 Discharge tube arrangementExpiredSep 04, 90May 05, 92[H05B]
D325645 Lighting fixtureExpiredDec 26, 89Apr 21, 92[]
D325646 Lighting fixtureExpiredDec 26, 89Apr 21, 92[]
5099174 Arc tube for a discharge lampExpiredJul 12, 89Mar 24, 92[H01J]
5086258 Discharge tube arrangementExpiredOct 04, 90Feb 04, 92[H05B]

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