Assignee
GRASS VALLEY GROUP
US·141 granted patents·4,408 citations·filing 1976–2001
Top patents by PatentIndex Score
141 records- 0196US5519828AVideo editing operator interface for aligning timelinesGRASS VALLEY GROUP·Filed 1994·Granted May 21, 1996·339 cites·7 claims
- 0296US5388197AVideo editing system operator inter-face for visualization and interactive control of video materialGRASS VALLEY GROUP·Filed 1994·Granted Feb 7, 1995·506 cites·10 claims
- 0395US4947097AAutomatic switching of motion control with tactile feedbackGRASS VALLEY GROUP·Filed 1989·Granted Aug 7, 1990·99 cites·4 claims
- 0494US6965723B1Non-linear video edit systemGRASS VALLEY GROUP·Filed 2000·Granted Nov 15, 2005·68 cites·4 claims
- 0594US4654696AVideo signal formatGRASS VALLEY GROUP·Filed 1985·Granted Mar 31, 1987·133 cites·40 claims
- 0693US4947440AShaping of automatic audio crossfadeGRASS VALLEY GROUP·Filed 1988·Granted Aug 7, 1990·112 cites·5 claims
- 0793US4800432AVideo Difference key generatorGRASS VALLEY GROUP·Filed 1986·Granted Jan 24, 1989·134 cites·5 claims
- 0888US5351092ASynchronization of digital audio with digital videoGRASS VALLEY GROUP·Filed 1993·Granted Sep 27, 1994·47 cites·4 claims
- 0988US4988982ATouch pad machine controlGRASS VALLEY GROUP·Filed 1989·Granted Jan 29, 1991·122 cites·14 claims
- 1088US4885792AAudio mixer architecture using virtual gain control and switchingGRASS VALLEY GROUP·Filed 1988·Granted Dec 5, 1989·53 cites·6 claims
- 1188US4698666AVideo key glow and border generatorGRASS VALLEY GROUP·Filed 1985·Granted Oct 6, 1987·66 cites·30 claims
- 1287US6763177B1Non-linear video edit systemGRASS VALLEY GROUP·Filed 2000·Granted Jul 13, 2004·25 cites·15 claims
- 1387US4797836AImage orientation and animation using quaternionsGRASS VALLEY GROUP·Filed 1986·Granted Jan 10, 1989·114 cites·21 claims
- 1486US4965668AAdaptive rounder for video signalsGRASS VALLEY GROUP·Filed 1989·Granted Oct 23, 1990·54 cites·6 claims
- 1586US4852035ASimple coefficient half-bandwidth digital filter for video data compressionGRASS VALLEY GROUP·Filed 1987·Granted Jul 25, 1989·36 cites·8 claims
- 1686US4319266AChroma keying systemGRASS VALLEY GROUP·Filed 1980·Granted Mar 9, 1982·45 cites·12 claims
- 1785US5051827ATelevision signal encoder/decoder configuration controlGRASS VALLEY GROUP·Filed 1990·Granted Sep 24, 1991·73 cites·8 claims
- 1884US4853784AVideo switcher with independent processing of selected video signalsGRASS VALLEY GROUP·Filed 1988·Granted Aug 1, 1989·53 cites·11 claims
- 1983US7013361B2Routing switcher with variable input/output architectureGRASS VALLEY GROUP·Filed 2001·Granted Mar 14, 2006·45 cites·11 claims
- 2082US4831447AMethod and apparatus for anti-aliasing an image boundary during video special effectsGRASS VALLEY GROUP·Filed 1987·Granted May 16, 1989·42 cites·7 claims
- 2182US4791483AAdaptive differential pulse code modulation video encoderGRASS VALLEY GROUP·Filed 1987·Granted Dec 13, 1988·40 cites·20 claims
- 2281US6411520B1Modular equipment frame and modulesGRASS VALLEY GROUP·Filed 2000·Granted Jun 25, 2002·45 cites·19 claims
- 2381US5400081AChroma keyer with correction for background defectsGRASS VALLEY GROUP·Filed 1994·Granted Mar 21, 1995·54 cites·14 claims
- 2481US5189516AVideo preview system for allowing multiple outputs to be viewed simultaneously on the same monitorGRASS VALLEY GROUP·Filed 1990·Granted Feb 23, 1993·88 cites·19 claims
- 2581US5124673ALevel independent automatic cable equalizerGRASS VALLEY GROUP·Filed 1991·Granted Jun 23, 1992·40 cites·10 claims
- 2680US4885582A"Simple code" encoder/decoderGRASS VALLEY GROUP·Filed 1987·Granted Dec 5, 1989·61 cites·7 claims
- 2780US4851912AApparatus for combining video signalsGRASS VALLEY GROUP·Filed 1988·Granted Jul 25, 1989·35 cites·11 claims
- 2880US4703447AMixer controlled variable passband finite impulse response filterGRASS VALLEY GROUP·Filed 1985·Granted Oct 27, 1987·28 cites·21 claims
- 2979US5249039AChroma key method and apparatusGRASS VALLEY GROUP·Filed 1991·Granted Sep 28, 1993·53 cites·24 claims
- 3078US5173948AVideo image mapping systemGRASS VALLEY GROUP·Filed 1991·Granted Dec 22, 1992·63 cites·20 claims
- 3178US4951036ATouchpad joggerGRASS VALLEY GROUP·Filed 1988·Granted Aug 21, 1990·94 cites·8 claims
- 3277US4743958AMultiple television standards input selector and convertorGRASS VALLEY GROUP·Filed 1986·Granted May 10, 1988·33 cites·9 claims
- 3376US4875097APerspective processing of a video signalGRASS VALLEY GROUP·Filed 1988·Granted Oct 17, 1989·29 cites·19 claims
- 3475US4750167ADigital audio transmission systemGRASS VALLEY GROUP·Filed 1986·Granted Jun 7, 1988·32 cites·6 claims
- 3574US4947255AVideo luminance self keyerGRASS VALLEY GROUP·Filed 1988·Granted Aug 7, 1990·26 cites·8 claims
- 3673US5465120ASpiral buffer for non-linear editingGRASS VALLEY GROUP·Filed 1994·Granted Nov 7, 1995·36 cites·2 claims
- 3773US5430615APrinted circuit board assemblyGRASS VALLEY GROUP·Filed 1994·Granted Jul 4, 1995·43 cites·17 claims
- 3873US5111160AClock generation circuit for multistandard serial digital video with automatic format identificationGRASS VALLEY GROUP·Filed 1991·Granted May 5, 1992·36 cites·20 claims
- 3973US4233629ASync separator with a look-ahead clampGRASS VALLEY GROUP·Filed 1979·Granted Nov 11, 1980·18 cites·23 claims
- 4071US4821269ADiagnostic system for a digital signal processorGRASS VALLEY GROUP·Filed 1986·Granted Apr 11, 1989·44 cites·9 claims
- 4170US5166797AVideo switcher with preview systemGRASS VALLEY GROUP·Filed 1990·Granted Nov 24, 1992·34 cites·11 claims
- 4269US4795916ALow power differential ECL line driverGRASS VALLEY GROUP·Filed 1987·Granted Jan 3, 1989·18 cites·6 claims
- 4368US5164966ANrz clock and data recovery system employing phase lock loopGRASS VALLEY GROUP·Filed 1991·Granted Nov 17, 1992·52 cites·37 claims
- 4468US4860098AVideo discrimination between different video formatsGRASS VALLEY GROUP·Filed 1988·Granted Aug 22, 1989·22 cites·4 claims
- 4568US4823183AVideo mixer with multicolor boarderGRASS VALLEY GROUP·Filed 1988·Granted Apr 18, 1989·21 cites·9 claims
- 4668US4805022ADigital wipe generatorGRASS VALLEY GROUP·Filed 1988·Granted Feb 14, 1989·21 cites·5 claims
- 4768US4752826AIntra-field recursive interpolatorGRASS VALLEY GROUP·Filed 1986·Granted Jun 21, 1988·25 cites·9 claims
- 4868US4689681ATelevision special effects systemGRASS VALLEY GROUP·Filed 1986·Granted Aug 25, 1987·22 cites·15 claims
- 4968US4525677ADifferential amplifier having high common-mode rejection ratioGRASS VALLEY GROUP·Filed 1983·Granted Jun 25, 1985·17 cites·4 claims
- 5067US5150203AVariable chrominance filtering for encoding television signalsGRASS VALLEY GROUP·Filed 1990·Granted Sep 22, 1992·26 cites·26 claims
Showing the top 50 of 141 patent records by PatentIndex Score.
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