Inventor · disambiguated record
Todd J. Christopher
Also filed as: CHRISTOPHER TODD · CHRISTOPHER TODD J
53 granted patents·1,598 citations·filing 1978–1997
99Inventor score
Top patents by PatentIndex Score
53 records- 0198US4819252ASampled data subsampling apparatusTHOMSON CONSUMER ELECTRONICS·Filed 1988·Granted Apr 4, 1989·119 cites·12 claims
- 0297US4821226ADual port video memory system having a bit-serial address input portRCA LICENSING CORP·Filed 1987·Granted Apr 11, 1989·163 cites·8 claims
- 0396US4419699ADigital on video recording and playback systemRCA CORP·Filed 1981·Granted Dec 6, 1983·128 cites·2 claims
- 0493US5351087ATwo stage interpolation systemTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Sep 27, 1994·142 cites·20 claims
- 0591US4694414ADigital delay interpolation filter with amplitude and phase compensationRCA CORP·Filed 1984·Granted Sep 15, 1987·38 cites·8 claims
- 0690US5689301AMethod and apparatus for identifying video fields produced by film sourcesTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Nov 18, 1997·106 cites·8 claims
- 0787US5563651AMethod and apparatus for identifying video fields produced by film sources employing 2-2 and 3-2 pull down sequencesTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Oct 8, 1996·77 cites·12 claims
- 0886US4309721AError coding for video disc systemRCA CORP·Filed 1979·Granted Jan 5, 1982·25 cites·9 claims
- 0985US5422680ANon-linear contrast control apparatus with pixel distribution measurement for video display systemTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Jun 6, 1995·72 cites·2 claims
- 1082US4494052ADC Motor servo systemRCA CORP·Filed 1982·Granted Jan 15, 1985·30 cites·12 claims
- 1182US4286290AFast recovery squelch circuit for a video disc playerRCA CORP·Filed 1979·Granted Aug 25, 1981·24 cites·11 claims
- 1281US4901077ASigma-delta modulator for D-to-A converterTHOMSON CONSUMER ELECTRONICS·Filed 1988·Granted Feb 13, 1990·34 cites·15 claims
- 1381US4638360ATiming correction for a picture-in-picture television systemRCA CORP·Filed 1985·Granted Jan 20, 1987·39 cites·17 claims
- 1477US4731851ADigital signal gain control circuitry for varying digital signals in substantially equal db stepsRCA CORP·Filed 1986·Granted Mar 15, 1988·27 cites·17 claims
- 1577US4656515AHorizontal compression of pixels in a reduced-size video image utilizing cooperating subsampling and display ratesRCA CORP·Filed 1985·Granted Apr 7, 1987·32 cites·9 claims
- 1676US4823302ABlock oriented random access memory able to perform a data read, a data write and a data refresh operation in one block-access timeRCA LICENSING CORP·Filed 1987·Granted Apr 18, 1989·33 cites·10 claims
- 1776US4652908AFiltering system for processing a reduced-resolution video imageRCA CORP·Filed 1985·Granted Mar 24, 1987·31 cites·10 claims
- 1875US5130798ADual band progressive television system with noise reductionTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Jul 14, 1992·39 cites·3 claims
- 1975US4203134AFM Signal demodulator with defect detectionRCA CORP·Filed 1978·Granted May 13, 1980·23 cites·8 claims
- 2072US4605962AProgressive scan television system with video compression exceeding display line rateRCA CORP·Filed 1984·Granted Aug 12, 1986·19 cites·4 claims
- 2171US6900845B1Memory architecture for a multiple format video signal processorTHOMSON LICENSING SA·Filed 1997·Granted May 31, 2005·40 cites·14 claims
- 2271US4760602AVariable preemphasis/deemphasis networkRCA LICENSING CORP·Filed 1986·Granted Jul 26, 1988·22 cites·19 claims
- 2368US5119195AVideo noise reduction system employing plural frequency bandsTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Jun 2, 1992·27 cites·17 claims
- 2468US4656516AVertical subsampling and memory synchronization system for a picture within a picture television receiverRCA CORP·Filed 1985·Granted Apr 7, 1987·22 cites·3 claims
- 2567US5084700ASignal clamp circuitry for analog-to-digital convertersTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Jan 28, 1992·26 cites·11 claims
- 2664US4757467AApparatus for estimating the square root of digital samplesRCA LICENSING CORP·Filed 1986·Granted Jul 12, 1988·32 cites·11 claims
- 2763US4680632ATelevision display system with flicker reduction processor having burst locked clock and skew correctionRCA CORP·Filed 1985·Granted Jul 14, 1987·18 cites·6 claims
- 2861US4593315AProgressive scan television receiver for non-standard signalsRCA CORP·Filed 1984·Granted Jun 3, 1986·13 cites·1 claims
- 2959US5412436AMotion adaptive video processing systemTHOMSON CONSUMER ELECTRONICS·Filed 1993·Granted May 2, 1995·18 cites·13 claims
- 3057US4327434AVideo disc stylus position sensor systemRCA CORP·Filed 1980·Granted Apr 27, 1982·9 cites·10 claims
- 3157US4280023AStylus position sensing apparatus for video disc playerRCA CORP·Filed 1979·Granted Jul 21, 1981·8 cites·3 claims
- 3256US5043813ADisplay locked timing signals for video processingTHOMSON CONSUMER ELECTRONICS·Filed 1990·Granted Aug 27, 1991·16 cites·27 claims
- 3355US4667240ATiming correction circuitry as for TV signal recursive filtersRCA CORP·Filed 1985·Granted May 19, 1987·13 cites·9 claims
- 3454US4764967ATone control system for sampled data signalsRCA LICENSING CORP·Filed 1987·Granted Aug 16, 1988·10 cites·10 claims
- 3553US4286235AVFO having plural feedback loopsRCA CORP·Filed 1979·Granted Aug 25, 1981·9 cites·12 claims
- 3652US4481429ABias supply for A.C. line powered apparatusRCA CORP·Filed 1982·Granted Nov 6, 1984·9 cites·10 claims
- 3751US4286282APeriodically biased video disc player servo systemRCA CORP·Filed 1979·Granted Aug 25, 1981·8 cites·9 claims
- 3850US4377788ASignal expanderRCA CORP·Filed 1981·Granted Mar 22, 1983·9 cites·6 claims
- 3947US4731844AApparatus for cancelling a pilot signal from a composite signalRCA CORP·Filed 1986·Granted Mar 15, 1988·9 cites·5 claims
- 4046US5619276AAdjustable video/raster phasing for horizontal deflection systemTHOMSON CONSUMER ELECTRONICS·Filed 1993·Granted Apr 8, 1997·9 cites·33 claims
- 4146US5166781AApparatus for identifying standard and non-standard video signalsTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Nov 24, 1992·11 cites·25 claims
- 4246US4777472AModified cascode amplifierRCA LICENSING CORP·Filed 1987·Granted Oct 11, 1988·9 cites·21 claims
- 4346US4247866ANested loop video disc servo systemRCA CORP·Filed 1979·Granted Jan 27, 1981·6 cites·11 claims
- 4444US5053726ACircuit for preventing VCXO mode jumpingTHOMSON CONSUMER ELECTRONICS·Filed 1990·Granted Oct 1, 1991·11 cites·8 claims
- 4538US5132784AComb filter-burst locked clock circuitryTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Jul 21, 1992·5 cites·6 claims
- 4638US4432015AVideo apparatus having improved antenna transfer switching systemRCA CORP·Filed 1982·Granted Feb 14, 1984·7 cites·12 claims
- 4738US4375094AApparatus for advancing a video disc pickup transducer beyond a disc record defectRCA CORP·Filed 1980·Granted Feb 22, 1983·3 cites·9 claims
- 4834US5448308AApparatus for clamping a video signal levelTHOMSON CONSUMER ELECTRONICS·Filed 1993·Granted Sep 5, 1995·4 cites·15 claims
- 4934US4841466ABit-serial integrator circuitryRCA LICENSING CORP·Filed 1987·Granted Jun 20, 1989·5 cites·6 claims
- 5034US4783756ASampled data tone control systemRCA LICENSING CORP·Filed 1986·Granted Nov 8, 1988·3 cites·15 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Todd J. Christopher files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →