Inventor · disambiguated record
Donald K. Belcher
Also filed as: BELCHER DONALD K · BELCHER DONALD KEITH
51 granted patents·1 pending application·3,672 citations·filing 1976–2007
99Inventor score
Top patents by PatentIndex Score
52 records- 0197US6380894B1Multi-lateration system with automatic calibration and error removalWHERENET CORP·Filed 2000·Granted Apr 30, 2002·228 cites·18 claims
- 0297US5920287ARadio location system for precisely tracking objects by RF transceiver tags which randomly and repetitively emit wideband identification signalsWIDATA CORP·Filed 1997·Granted Jul 6, 1999·386 cites·34 claims
- 0396US5760646AFeed-forward correction loop with adaptive predistortion injection for linearization of RF power amplifierSPECTRIAN·Filed 1996·Granted Jun 2, 1998·183 cites·19 claims
- 0495US6892054B2Interference suppression for wireless local area network and location systemWHERENET CORP·Filed 2001·Granted May 10, 2005·145 cites·35 claims
- 0595US6593885B2Low cost DTOA location processing system based on multiple readers-to-single processor architectureWHERENET CORP·Filed 2001·Granted Jul 15, 2003·150 cites·20 claims
- 0695US5892397AAdaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitudeSPECTRIAN·Filed 1996·Granted Apr 6, 1999·136 cites·25 claims
- 0795US5589844AAutomatic antenna tuner for low-cost mobile radioFLASH COMM INC·Filed 1995·Granted Dec 31, 1996·187 cites·9 claims
- 0893US7918190B2Electronic animal containment system with direction of approach determinationRADIO SYSTEMS CORP·Filed 2007·Granted Apr 5, 2011·45 cites·27 claims
- 0993US6127976ADistributed network for multi-lateration with circularly polarized antenna for hemispherical coverageWHERENET INC·Filed 1999·Granted Oct 3, 2000·278 cites·20 claims
- 1093US6121926ARadio geo-location system with advanced first received wavefront arrival determinationWHERENET·Filed 1999·Granted Sep 19, 2000·173 cites·16 claims
- 1193US5734963ARemote initiated messaging apparatus and method in a two way wireless data communications networkFLASH COMM INC·Filed 1995·Granted Mar 31, 1998·271 cites·22 claims
- 1292US5995046ARadio geo-location system with advanced first received wavefront arrival determinationWIDATA CORP·Filed 1999·Granted Nov 30, 1999·188 cites·12 claims
- 1391US6366242B1Computer workstation tool for displaying performance estimate of tagged object geo-location system for proposed geometry layout of tag transmission readersWHERENET CORP·Filed 2000·Granted Apr 2, 2002·124 cites·17 claims
- 1489US7377234B2Portable animal tracking systemRADIO SYSTEMS CORP·Filed 2005·Granted May 27, 2008·16 cites·14 claims
- 1588US6987744B2Wireless local area network with geo-location capabilityWHERENET CORP·Filed 2001·Granted Jan 17, 2006·74 cites·36 claims
- 1688US4969159ASpread spectrum communication system employing composite spreading codes with matched filter demodulatorHARRIS CORP·Filed 1989·Granted Nov 6, 1990·115 cites·19 claims
- 1786US6072375AWaveguide with edge groundingHARRIS CORP·Filed 1998·Granted Jun 6, 2000·44 cites·48 claims
- 1883US6853687B2Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation systemWHERENET CORP·Filed 2001·Granted Feb 8, 2005·52 cites·20 claims
- 1982US6812839B1Use of rotating magnetic field to enhance communication with RF burst-transmitting tags of object location systemWHERENET CORP·Filed 2001·Granted Nov 2, 2004·49 cites·13 claims
- 2082US6170748B1Object identification system employing pulsed magnetic field-stimulated, tag-embedded transponderWIDATA CORP·Filed 1998·Granted Jan 9, 2001·81 cites·16 claims
- 2181US6393045B1Spread spectrum baseband modulation of magnetic fields for communications and proximity sensingWHERENET CORP·Filed 1998·Granted May 21, 2002·67 cites·16 claims
- 2281US5477210AProximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic fieldsHARRIS CORP·Filed 1994·Granted Dec 19, 1995·61 cites·10 claims
- 2379US5041797AMicro-power gain latticeHARRIS CORP·Filed 1990·Granted Aug 20, 1991·35 cites·6 claims
- 2477US6859485B2Geolocation system with controllable tags enabled by wireless communications to the tagsWHERENET CORP·Filed 2001·Granted Feb 22, 2005·37 cites·28 claims
- 2577US5710519ACircuit for automatically biasing RF power transistor by use of on-chip temperature-sensing transistorSPECTRIAN·Filed 1996·Granted Jan 20, 1998·40 cites·35 claims
- 2676US6268723B1Magnetic field emission and differential receiver coil configuration for discriminating response magnetic field from transponder tagWHERENET CORP·Filed 1998·Granted Jul 31, 2001·52 cites·10 claims
- 2776US6029285AAdaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitudeSPECTRIAN·Filed 1999·Granted Feb 29, 2000·31 cites·11 claims
- 2876US5789927ABaseband measurement of RF power amplifier distortionSPECTRIAN·Filed 1996·Granted Aug 4, 1998·37 cites·20 claims
- 2974US5940045AOptimization of DC power to effective irradiated power conversion efficiency for helical antennaHARRIS CORP·Filed 1996·Granted Aug 17, 1999·45 cites·17 claims
- 3068US6476719B2Ultra-sensitive magnetic field receiver capable of operating in high noise environmentsWHERENET CORP·Filed 2001·Granted Nov 5, 2002·17 cites·19 claims
- 3168US5640442ATechnique for determining propagating and clear frequency to be used in wide area wireless data communications networkFLASH COMM INC·Filed 1996·Granted Jun 17, 1997·62 cites·20 claims
- 3268US5557495AVariable capacitor and methodHARRIS CORP·Filed 1994·Granted Sep 17, 1996·27 cites·25 claims
- 3367US7212563B2Real-time locating system and method using timing signalWHERENET CORP·Filed 2002·Granted May 1, 2007·23 cites·10 claims
- 3465US5434357AReduced semiconductor size packageFiled 1991·Granted Jul 18, 1995·37 cites·2 claims
- 3558US5765112ALow cost wide area network for data communication using outbound message specifying inbound message time and frequencyFLASH COMM INC·Filed 1995·Granted Jun 9, 1998·41 cites·26 claims
- 3658US4737739AMonolithic FET bridge attenuatorHARRIS CORP·Filed 1986·Granted Apr 12, 1988·13 cites·9 claims
- 3757US5661459AProximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic fieldsHARRIS CORP·Filed 1995·Granted Aug 26, 1997·21 cites·31 claims
- 3849US4277764AMicrowave transistor stabilization circuitHARRIS CORP·Filed 1978·Granted Jul 7, 1981·6 cites·7 claims
- 3948US5203016ASignal quality-dependent adaptive recursive integratorHARRIS CORP·Filed 1990·Granted Apr 13, 1993·19 cites·9 claims
- 4046US4700153APhase-compensated FET attenuatorHARRIS CORP·Filed 1986·Granted Oct 13, 1987·8 cites·17 claims
- 4142US4041410ARF level detectorHARRIS CORP·Filed 1976·Granted Aug 9, 1977·4 cites·6 claims
- 4239US5535039ADivergence feedback in a linear fiber optic analog transmission system and methodHARRIS CORP·Filed 1994·Granted Jul 9, 1996·9 cites·10 claims
- 4338US5394113AHigh impedance low-distortion linear amplifierHARRIS CORP·Filed 1992·Granted Feb 28, 1995·5 cites·12 claims
- 4437US5659325ALow impedance loop antenna and drive circuitryHARRIS CORP·Filed 1994·Granted Aug 19, 1997·8 cites·16 claims
- 4536US6721369B1Composite BPSK/AM-BPSK based spectral suppression of out-of-band energy from saturated RF amplifierWHERENET CORP·Filed 1999·Granted Apr 13, 2004·8 cites·18 claims
- 4636US5774502AFully integrated data receiver and method for receiving on/off keyed AM/PDSK modulated signalsHARRIS CORP·Filed 1996·Granted Jun 30, 1998·10 cites·22 claims
- 4735US5627526AProximity detection using DPSK waveformHARRIS CORP·Filed 1994·Granted May 6, 1997·6 cites·20 claims
- 4835US5557617AFrequency division switching using RF bussHARRIS CORP·Filed 1995·Granted Sep 17, 1996·8 cites·23 claims
- 4935US5550824ARF signal distribution schemeHARRIS CORP·Filed 1995·Granted Aug 27, 1996·4 cites·20 claims
- 5033US5319315AClass-C RF power amplifier having digitally driven shunt circuit for removing accumulated excess base chargeHARRIS CORP·Filed 1992·Granted Jun 7, 1994·3 cites·9 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →