Assignee
IN FOCUS SYSTEMS INC
US·49 granted patents·3,015 citations·filing 1988–2000
Top patents by PatentIndex Score
49 records- 0198US4966441AHybrid color display systemIN FOCUS SYSTEMS INC·Filed 1989·Granted Oct 30, 1990·241 cites·15 claims
- 0295US4917465AColor display systemIN FOCUS SYSTEMS INC·Filed 1989·Granted Apr 17, 1990·192 cites·23 claims
- 0394US5537232AReflection hologram multiple-color filter array formed by sequential exposure to a light sourceIN FOCUS SYSTEMS INC·Filed 1993·Granted Jul 16, 1996·142 cites·8 claims
- 0493US6053615AImage projector with polarization conversion systemIN FOCUS SYSTEMS INC·Filed 1997·Granted Apr 25, 2000·119 cites·13 claims
- 0593US5420604ALCD addressing systemIN FOCUS SYSTEMS INC·Filed 1993·Granted May 30, 1995·87 cites·42 claims
- 0693US5050965AColor display using supertwisted nematic liquid crystal materialIN FOCUS SYSTEMS INC·Filed 1989·Granted Sep 24, 1991·108 cites·64 claims
- 0792US6056405ALamp module with kinematic mountIN FOCUS SYSTEMS INC·Filed 1998·Granted May 2, 2000·56 cites·15 claims
- 0891USD381634SHand-held remote control deviceIN FOCUS SYSTEMS INC·Filed 1996·Granted Jul 29, 1997·58 cites·1 claims
- 0991US5548422ANotch filters with cholesteric polarizers with birefringent film and linear polarizerIN FOCUS SYSTEMS INC·Filed 1993·Granted Aug 20, 1996·105 cites·7 claims
- 1091US5101197AElectronic transparency method and apparatusIN FOCUS SYSTEMS INC·Filed 1988·Granted Mar 31, 1992·72 cites·12 claims
- 1189US5585816ADisplaying gray shades on display panel implemented with active addressing techniqueIN FOCUS SYSTEMS INC·Filed 1995·Granted Dec 17, 1996·67 cites·16 claims
- 1289US5355188AMethod and apparatus for distortion correction in optical projectorsIN FOCUS SYSTEMS INC·Filed 1993·Granted Oct 11, 1994·104 cites·14 claims
- 1388US5805233AMethod and apparatus for automatic pixel clock phase and frequency correction in analog to digital video signal conversionIN FOCUS SYSTEMS INC·Filed 1996·Granted Sep 8, 1998·90 cites·20 claims
- 1488US5485173ALCD addressing system and methodIN FOCUS SYSTEMS INC·Filed 1991·Granted Jan 16, 1996·60 cites·79 claims
- 1588US5459495AGray level addressing for LCDsIN FOCUS SYSTEMS INC·Filed 1992·Granted Oct 17, 1995·70 cites·33 claims
- 1686US5978051AImage projection system with variable display formatIN FOCUS SYSTEMS INC·Filed 1996·Granted Nov 2, 1999·98 cites·14 claims
- 1786US5967636AColor wheel synchronization apparatus and methodIN FOCUS SYSTEMS INC·Filed 1998·Granted Oct 19, 1999·131 cites·20 claims
- 1886US5852429ADisplaying gray shades on display panel implemented with phase-displaced multiple row selectionsIN FOCUS SYSTEMS INC·Filed 1996·Granted Dec 22, 1998·55 cites·16 claims
- 1984US5855488AProtection lamp safety interconnect apparatus and methodIN FOCUS SYSTEMS INC·Filed 1997·Granted Jan 5, 1999·48 cites·13 claims
- 2084US5546102AIntegrated driver for display implemented with active addressing techniqueIN FOCUS SYSTEMS INC·Filed 1995·Granted Aug 13, 1996·50 cites·23 claims
- 2184US5124818ALCD system having improved contrast ratioIN FOCUS SYSTEMS INC·Filed 1990·Granted Jun 23, 1992·108 cites·19 claims
- 2284US4952036AHigh resolution LCD display systemIN FOCUS SYSTEMS INC·Filed 1989·Granted Aug 28, 1990·55 cites·2 claims
- 2382US5793352ASource coupler for multimedia projection display systemIN FOCUS SYSTEMS INC·Filed 1996·Granted Aug 11, 1998·78 cites·34 claims
- 2482US5767836AGray level addressing for LCDsIN FOCUS SYSTEMS INC·Filed 1995·Granted Jun 16, 1998·51 cites·37 claims
- 2581US5473338AAddressing method and system having minimal crosstalk effectsIN FOCUS SYSTEMS INC·Filed 1993·Granted Dec 5, 1995·56 cites·25 claims
- 2681USD317446SElectronic data display panel for use with an overhead projectorIN FOCUS SYSTEMS INC·Filed 1988·Granted Jun 11, 1991·21 cites·1 claims
- 2779US5526011AElectronic transparency with data storage mediumIN FOCUS SYSTEMS INC·Filed 1993·Granted Jun 11, 1996·69 cites·25 claims
- 2878US5795049AImage projection systemIN FOCUS SYSTEMS INC·Filed 1996·Granted Aug 18, 1998·46 cites·19 claims
- 2978US5767916AMethod and apparatus for automatic pixel clock phase and frequency correction in analog to digital video signal conversionIN FOCUS SYSTEMS INC·Filed 1996·Granted Jun 16, 1998·63 cites·20 claims
- 3076US5742438AProjection illumination systemIN FOCUS SYSTEMS INC·Filed 1994·Granted Apr 21, 1998·41 cites·22 claims
- 3176US5617113AMemory configuration for display informationIN FOCUS SYSTEMS INC·Filed 1994·Granted Apr 1, 1997·48 cites·17 claims
- 3274US5353075AConvertible flat panel display systemIN FOCUS SYSTEMS INC·Filed 1993·Granted Oct 4, 1994·70 cites·37 claims
- 3373USD389850SMultimedia projectorIN FOCUS SYSTEMS INC·Filed 1996·Granted Jan 27, 1998·17 cites·1 claims
- 3472US5608551ADisplay panel assembly with microlens structureIN FOCUS SYSTEMS INC·Filed 1995·Granted Mar 4, 1997·51 cites·17 claims
- 3572US5508716APlural line liquid crystal addressing method and apparatusIN FOCUS SYSTEMS INC·Filed 1994·Granted Apr 16, 1996·37 cites·21 claims
- 3671US5861869AGray level addressing for LCDsIN FOCUS SYSTEMS INC·Filed 1995·Granted Jan 19, 1999·40 cites·22 claims
- 3771US5790084AElectronic transparency method and apparatusIN FOCUS SYSTEMS INC·Filed 1995·Granted Aug 4, 1998·36 cites·21 claims
- 3870USD324210SElectronic data display panel for use with an overhead projectorIN FOCUS SYSTEMS INC·Filed 1988·Granted Feb 25, 1992·13 cites·1 claims
- 3963US5337103ACase for overhead projection display panelIN FOCUS SYSTEMS INC·Filed 1993·Granted Aug 9, 1994·26 cites·38 claims
- 4062US5440322APassive matrix display having reduced image-degrading crosstalk effectsIN FOCUS SYSTEMS INC·Filed 1993·Granted Aug 8, 1995·25 cites·24 claims
- 4159US5975704AMultimedia projection system with image quality correctionIN FOCUS SYSTEMS INC·Filed 1998·Granted Nov 2, 1999·21 cites·5 claims
- 4258US5367390AContrast improvement for display panels with masks between electrodes and covering split between electrode portionsIN FOCUS SYSTEMS INC·Filed 1993·Granted Nov 22, 1994·23 cites·10 claims
- 4356USRE36654EStacked LCD color displayIN FOCUS SYSTEMS INC·Filed 1996·Granted Apr 11, 2000·22 cites·64 claims
- 4455US5642133ASplit interval gray level addressing for LCDsIN FOCUS SYSTEMS INC·Filed 1995·Granted Jun 24, 1997·15 cites·37 claims
- 4554US6476566B2Method and apparatus for canceling ripple current in a lampIN FOCUS SYSTEMS INC·Filed 2000·Granted Nov 5, 2002·4 cites·29 claims
- 4643US5861718AARC lamp igniter apparatus and methodIN FOCUS SYSTEMS INC·Filed 1997·Granted Jan 19, 1999·9 cites·19 claims
- 4741US5722752AMultimedia projection system with image quality correctionIN FOCUS SYSTEMS INC·Filed 1997·Granted Mar 3, 1998·11 cites·7 claims
- 4831USD382580SMultimedia projectorIN FOCUS SYSTEMS INC·Filed 1996·Granted Aug 19, 1997·2 cites·1 claims
- 4928US5640173AMethods and systems for detecting and correcting dynamic crosstalk effects appearing in moving display patternsIN FOCUS SYSTEMS INC·Filed 1995·Granted Jun 17, 1997·4 cites·19 claims
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