Assignee
EMI PLC THORN
GB·131 granted patents·5,426 citations·filing 1982–1995
Top patents by PatentIndex Score
131 records- 0199US5193015ACholesteric liquid crystal screen which reflects substantially all of the projected lightEMI PLC THORN·Filed 1990·Granted Mar 9, 1993·176 cites·3 claims
- 0296US5122791ADisplay device incorporating brightness control and a method of operating such a displayEMI PLC THORN·Filed 1987·Granted Jun 16, 1992·208 cites·10 claims
- 0396US4764797AChemical-sensitive semiconductor deviceEMI PLC THORN·Filed 1986·Granted Aug 16, 1988·185 cites·12 claims
- 0495US5113437ASignal identification systemEMI PLC THORN·Filed 1989·Granted May 12, 1992·465 cites·10 claims
- 0594US5079648AMarked recorded signalsEMI PLC THORN·Filed 1989·Granted Jan 7, 1992·296 cites·5 claims
- 0694US4876617ASignal identificationEMI PLC THORN·Filed 1987·Granted Oct 24, 1989·362 cites·4 claims
- 0793US5206145AMethod of measuring the concentration of a substance in a sample solutionEMI PLC THORN·Filed 1991·Granted Apr 27, 1993·263 cites·6 claims
- 0893US5177341AThick film electrically resistive tracksEMI PLC THORN·Filed 1988·Granted Jan 5, 1993·82 cites·20 claims
- 0992US5093652ADisplay deviceEMI PLC THORN·Filed 1991·Granted Mar 3, 1992·139 cites·9 claims
- 1092US5086258ADischarge tube arrangementEMI PLC THORN·Filed 1990·Granted Feb 4, 1992·92 cites·7 claims
- 1192US5064618ASensor arrangementsEMI PLC THORN·Filed 1988·Granted Nov 12, 1991·163 cites·7 claims
- 1291US5072157AExcitation device suitable for exciting surface waves in a discharge tubeEMI PLC THORN·Filed 1989·Granted Dec 10, 1991·111 cites·5 claims
- 1391US4965415AMicroengineered diaphragm pressure switchEMI PLC THORN·Filed 1989·Granted Oct 23, 1990·78 cites·6 claims
- 1490US4710677AIncandescent lampsEMI PLC THORN·Filed 1984·Granted Dec 1, 1987·61 cites·6 claims
- 1588US4995719AMethod of and an apparatus for projecting a scanned two- or three-dimensional modulated light pattern originating from a light sourceEMI PLC THORN·Filed 1989·Granted Feb 26, 1991·63 cites·22 claims
- 1688US4507584ADischarge lamp with metal coil electrode support inserted into cermet end capEMI PLC THORN·Filed 1982·Granted Mar 26, 1985·46 cites·12 claims
- 1787US4864290ADisplay deviceEMI PLC THORN·Filed 1987·Granted Sep 5, 1989·68 cites·10 claims
- 1886US5619586AMethod and apparatus for producing a directly viewable image of a fingerprintEMI PLC THORN·Filed 1995·Granted Apr 8, 1997·170 cites·10 claims
- 1986US5459598AOptical modulation device with liquid crystal voids formed by the spacer arrangementsEMI PLC THORN·Filed 1993·Granted Oct 17, 1995·90 cites·5 claims
- 2086US5143438ALight sourcesEMI PLC THORN·Filed 1991·Granted Sep 1, 1992·71 cites·11 claims
- 2186US5124695ADisplay deviceEMI PLC THORN·Filed 1990·Granted Jun 23, 1992·86 cites·5 claims
- 2285US4978814AElectrical device including an electrical connectorEMI PLC THORN·Filed 1989·Granted Dec 18, 1990·58 cites·6 claims
- 2384US4958165ACircular polarization antennaEMI PLC THORN·Filed 1988·Granted Sep 18, 1990·79 cites·2 claims
- 2484US4859835AElectrically resistive tracksEMI PLC THORN·Filed 1988·Granted Aug 22, 1989·44 cites·19 claims
- 2583US5764411AApparatus for displaying an imageEMI PLC THORN·Filed 1993·Granted Jun 9, 1998·55 cites·2 claims
- 2683US4931851AGas sensitive deviceEMI PLC THORN·Filed 1987·Granted Jun 5, 1990·74 cites·11 claims
- 2782US4983810AHeating unit with thermochromic regionEMI PLC THORN·Filed 1988·Granted Jan 8, 1991·40 cites·8 claims
- 2882US4890480ARelating to devices for measuring fluid densityEMI PLC THORN·Filed 1988·Granted Jan 2, 1990·45 cites·6 claims
- 2981US5233338ADisplay devices having color sequential illuminationEMI PLC THORN·Filed 1991·Granted Aug 3, 1993·66 cites·18 claims
- 3081US5122944AMounting arrangement for a lamp fittingEMI PLC THORN·Filed 1990·Granted Jun 16, 1992·47 cites·10 claims
- 3181US4943126AReplication of carriers bearing digitally recorded informationEMI PLC THORN·Filed 1989·Granted Jul 24, 1990·58 cites·8 claims
- 3281US4815067AOptical rotary headwheel tape recording systemEMI PLC THORN·Filed 1987·Granted Mar 21, 1989·34 cites·13 claims
- 3379US5039207ALiquid crystal display device with prismatic light transmitting memberEMI PLC THORN·Filed 1989·Granted Aug 13, 1991·46 cites·10 claims
- 3479US4969732ADisplay deviceEMI PLC THORN·Filed 1989·Granted Nov 13, 1990·51 cites·7 claims
- 3578US5189406ADisplay deviceEMI PLC THORN·Filed 1991·Granted Feb 23, 1993·70 cites·26 claims
- 3678US4924308ABandwidth reduction system for television signalsEMI PLC THORN·Filed 1989·Granted May 8, 1990·68 cites·4 claims
- 3778US4458301ADischarge lamps with curved sections and central connectionsEMI PLC THORN·Filed 1982·Granted Jul 3, 1984·33 cites·23 claims
- 3876US5076203ACoating apparatus for thin plastics websEMI PLC THORN·Filed 1990·Granted Dec 31, 1991·51 cites·11 claims
- 3976US4910432ACeramic metal halide lampsEMI PLC THORN·Filed 1988·Granted Mar 20, 1990·31 cites·8 claims
- 4074US4808882AHigh pressure discharge lamp with overhung end arc tube and cermet endsEMI PLC THORN·Filed 1986·Granted Feb 28, 1989·22 cites·15 claims
- 4174US4739219AElectric lamp with pinch sealed outer conductor of non-highly refractory materialEMI PLC THORN·Filed 1987·Granted Apr 19, 1988·18 cites·19 claims
- 4272US5162658AThermal detection arrangement having a plurality of optical filter devicesEMI PLC THORN·Filed 1991·Granted Nov 10, 1992·37 cites·20 claims
- 4371USD306765SLampEMI PLC THORN·Filed 1987·Granted Mar 20, 1990·15 cites·1 claims
- 4471US4450509ALanterns for area lightingEMI PLC THORN·Filed 1982·Granted May 22, 1984·44 cites·19 claims
- 4570US4904090ATemperature sensing arrangementEMI PLC THORN·Filed 1987·Granted Feb 27, 1990·30 cites·7 claims
- 4670US4598194AQuartz infra-red lampsEMI PLC THORN·Filed 1985·Granted Jul 1, 1986·28 cites·5 claims
- 4767US5633947AMethod and apparatus for fingerprint characterization and recognition using auto correlation patternEMI PLC THORN·Filed 1994·Granted May 27, 1997·50 cites·18 claims
- 4867US5099174AArc tube for a discharge lampEMI PLC THORN·Filed 1989·Granted Mar 24, 1992·21 cites·13 claims
- 4967US5028847ALauncher suitable for exciting surface waves in a discharge tubeEMI PLC THORN·Filed 1989·Granted Jul 2, 1991·17 cites·13 claims
- 5067US4549251ADischarge lampsEMI PLC THORN·Filed 1983·Granted Oct 22, 1985·21 cites·15 claims
Showing the top 50 of 131 patent records by PatentIndex Score.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →