Inventor · disambiguated record
Leopold A. Harwood
Also filed as: HARWOOD LEOPOLD A · HARWOOD LEOPOLD ALBERT
68 granted patents·1,044 citations·filing 1974–1990
99Inventor score
Top patents by PatentIndex Score
68 records- 0194US4661853AInterfield image motion detector for video signalsRCA CORP·Filed 1985·Granted Apr 28, 1987·133 cites·12 claims
- 0290US5170155ASystem for applying brightness signals to a display device and comparator thereforeTHOMSON SA·Filed 1990·Granted Dec 8, 1992·97 cites·12 claims
- 0386US4651211AVideo signal motion detecting apparatusRCA CORP·Filed 1986·Granted Mar 17, 1987·60 cites·16 claims
- 0485US4197557ABrightness control circuit employing a closed control loopRCA CORP·Filed 1977·Granted Apr 8, 1980·39 cites·14 claims
- 0584US4694327ADigital phase locked loop stabilization circuitry using a secondary digital phase locked loopRCA CORP·Filed 1986·Granted Sep 15, 1987·47 cites·9 claims
- 0684US4253110AAutomatic kinescope beam current limiter with sequential control modesRCA CORP·Filed 1979·Granted Feb 24, 1981·32 cites·16 claims
- 0782US4019118AThird harmonic signal generatorRCA CORP·Filed 1976·Granted Apr 19, 1977·28 cites·16 claims
- 0881US4684989ASignal background noise detectorRCA CORP·Filed 1986·Granted Aug 4, 1987·40 cites·9 claims
- 0980US4020500AControlled oscillatorRCA CORP·Filed 1975·Granted Apr 26, 1977·26 cites·15 claims
- 1078US4686560APhase locked loop system including analog and digital componentsRCA CORP·Filed 1986·Granted Aug 11, 1987·33 cites·6 claims
- 1176US4051519APhase control circuit suitable for use in a tint control stage of a color television systemRCA CORP·Filed 1975·Granted Sep 27, 1977·16 cites·22 claims
- 1275US4562460AManual hue control as for a digital TVRCA CORP·Filed 1983·Granted Dec 31, 1985·22 cites·11 claims
- 1375US4263610AControlled output composite keying signal generator for a television receiverRCA CORP·Filed 1980·Granted Apr 21, 1981·23 cites·10 claims
- 1474US4700217AChrominance signal phase locked loop system for use in a digital television receiver having a line-locked clock signalRCA CORP·Filed 1986·Granted Oct 13, 1987·28 cites·12 claims
- 1573US4651196AAdaptive control of the chrominance signal frequency response in a video signal processing systemRCA CORP·Filed 1985·Granted Mar 17, 1987·26 cites·8 claims
- 1672US4209808AStabilized automatic brightness control network in a video signal processing system including an automatic kinescope beam current limiterRCA CORP·Filed 1979·Granted Jun 24, 1980·17 cites·6 claims
- 1770US4385311AFilter and phase shift circuit for a television automatic flesh color correction systemRCA CORP·Filed 1981·Granted May 24, 1983·20 cites·15 claims
- 1869US4143398AAutomatic brightness control circuit employing a closed control loop stabilized against disruption by large amplitude video signalsRCA CORP·Filed 1978·Granted Mar 6, 1979·16 cites·15 claims
- 1968US4703340AFrequency division multiplexed analog to digital converterRCA CORP·Filed 1986·Granted Oct 27, 1987·22 cites·7 claims
- 2067US4399460AVideo signal peaking control system with provision for automatic and manual controlRCA CORP·Filed 1981·Granted Aug 16, 1983·10 cites·12 claims
- 2165US4096518AAverage beam current limiterRCA CORP·Filed 1977·Granted Jun 20, 1978·14 cites·10 claims
- 2260US4716462AMotion adaptive television signal processing systemRCA CORP·Filed 1986·Granted Dec 29, 1987·16 cites·18 claims
- 2360US4626894ASignal filtering system having adaptively cascaded filter stages for developing a variable bandwidth frequency characteristicRCA CORP·Filed 1984·Granted Dec 2, 1986·13 cites·14 claims
- 2460US4426625ACircuit for linearly gain controlling a differential amplifierRCA CORP·Filed 1981·Granted Jan 17, 1984·13 cites·9 claims
- 2560US4207592AAutomatic kinescope bias control circuitRCA CORP·Filed 1978·Granted Jun 10, 1980·11 cites·13 claims
- 2659US3996608AHue correction apparatus having a restricted rangeRCA CORP·Filed 1975·Granted Dec 7, 1976·11 cites·7 claims
- 2757US4660084ATelevision receiver with selectable video input signalsRCA CORP·Filed 1985·Granted Apr 21, 1987·14 cites·8 claims
- 2854US4435729ATelevision receiver with selectively disabled on-screen character display systemRCA CORP·Filed 1982·Granted Mar 6, 1984·10 cites·5 claims
- 2954US4302792ATransistor protection circuitRCA CORP·Filed 1980·Granted Nov 24, 1981·12 cites·11 claims
- 3053US4464633AAmplifier incorporating gain distribution control for cascaded amplifying stagesRCA CORP·Filed 1982·Granted Aug 7, 1984·9 cites·10 claims
- 3152US4229759ASignal detector including sample and hold circuit with reduced offset errorRCA CORP·Filed 1978·Granted Oct 21, 1980·8 cites·13 claims
- 3251US4630102ADigital chroma overload systemRCA CORP·Filed 1984·Granted Dec 16, 1986·9 cites·14 claims
- 3350US4660085ATelevision receiver responsive to plural video signalsRCA CORP·Filed 1985·Granted Apr 21, 1987·10 cites·13 claims
- 3450US4095255AControlled oscillator with increased immunity to parasitic capacitanceRCA CORP·Filed 1977·Granted Jun 13, 1978·8 cites·11 claims
- 3549US4441121AAdjustable coring circuitRCA CORP·Filed 1983·Granted Apr 3, 1984·8 cites·4 claims
- 3649US4325076AElectronic filter for generating a third harmonic signalRCA CORP·Filed 1980·Granted Apr 13, 1982·9 cites·5 claims
- 3748US4686561AVertical detail information restoration circuitRCA CORP·Filed 1985·Granted Aug 11, 1987·9 cites·9 claims
- 3848US4404593ABrightness control circuitRCA CORP·Filed 1981·Granted Sep 13, 1983·8 cites·2 claims
- 3948US4203131APredictable automatic brightness control circuit in a video signal image reproducing systemRCA CORP·Filed 1979·Granted May 13, 1980·7 cites·13 claims
- 4048US4054905AAutomatic chrominance gain control systemRCA CORP·Filed 1976·Granted Oct 18, 1977·7 cites·8 claims
- 4146US4386370AClamping arrangement for a video signal peaking systemRCA CORP·Filed 1981·Granted May 31, 1983·7 cites·16 claims
- 4245US4249199APhase compensated controlled oscillatorRCA CORP·Filed 1979·Granted Feb 3, 1981·6 cites·8 claims
- 4345US4051521AVideo amplifier for combining luminance and chrominance signalsRCA CORP·Filed 1976·Granted Sep 27, 1977·6 cites·11 claims
- 4442US4623924AVideo signal auto peaking circuitryRCA CORP·Filed 1985·Granted Nov 18, 1986·7 cites·9 claims
- 4542US4148058APAL switching control circuitRCA CORP·Filed 1977·Granted Apr 3, 1979·6 cites·8 claims
- 4642US4038681AChroma-burst separator and amplifierRCA CORP·Filed 1976·Granted Jul 26, 1977·5 cites·11 claims
- 4740US4611240AChrominance processor control systemRCA CORP·Filed 1984·Granted Sep 9, 1986·5 cites·3 claims
- 4839US4694331AVertical transition processor for a comb filterRCA CORP·Filed 1985·Granted Sep 15, 1987·6 cites·17 claims
- 4938US4485353APLL Oscillator synchronizing system with matrix for phase correctionRCA CORP·Filed 1982·Granted Nov 27, 1984·6 cites·6 claims
- 5037US4485354APLL Oscillator synchronizing system with DC control of free-running frequencyRCA CORP·Filed 1982·Granted Nov 27, 1984·4 cites·8 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Leopold A. Harwood 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 →