Inventor · disambiguated record
Charles A. Walton
Also filed as: WALTON CHARLES · WALTON CHARLES A
31 granted patents·10 pending applications·3,197 citations·filing 1975–2024
98Inventor score
Files withWALTON CHARLES A25MASTERCARD INTERNATIONAL INC5SCHLAGE ELECTRONICS INC2SIELOX SYSTEMS INC1
Top patents by PatentIndex Score
41 records- 0199US5989157AExercising system with electronic inertial game playingFiled 1997·Granted Nov 23, 1999·614 cites·23 claims
- 0299US4654658AIdentification system with vector phase angle detectionWALTON CHARLES A·Filed 1984·Granted Mar 31, 1987·127 cites·9 claims
- 0397US4980539APortable warmerWALTON CHARLES A·Filed 1990·Granted Dec 25, 1990·132 cites·9 claims
- 0496US6590536B1Body motion detecting system with correction for tilt of accelerometers and remote measurement of body positionFiled 2000·Granted Jul 8, 2003·246 cites·5 claims
- 0595US4384288APortable radio frequency emitting identifierWALTON CHARLES A·Filed 1980·Granted May 17, 1983·261 cites·5 claims
- 0694US4546241AElectronic proximity identification systemWALTON CHARLES A·Filed 1982·Granted Oct 8, 1985·215 cites·8 claims
- 0794US4236068APersonal identification and signaling systemWALTON CHARLES A·Filed 1979·Granted Nov 25, 1980·126 cites·26 claims
- 0894US4223830AIdentification systemWALTON CHARLES A·Filed 1978·Granted Sep 23, 1980·128 cites·13 claims
- 0991US4388524AElectronic identification and recognition system with code changeable reactanceWALTON CHARLES A·Filed 1981·Granted Jun 14, 1983·156 cites·15 claims
- 1090US4782342AProximity identification system with lateral flux pathsWALTON CHARLES A·Filed 1986·Granted Nov 1, 1988·74 cites·28 claims
- 1190US4473825AElectronic identification system with power input-output interlock and increased capabilitiesWALTON CHARLES A·Filed 1982·Granted Sep 25, 1984·154 cites·12 claims
- 1288US4918416AElectronic proximity identification systemSIELOX SYSTEMS INC·Filed 1988·Granted Apr 17, 1990·85 cites·10 claims
- 1388US4580041AElectronic proximity identification system with simplified low power identifierWALTON CHARLES A·Filed 1983·Granted Apr 1, 1986·134 cites·10 claims
- 1486US4142674ARecognition and identification key having adaptable resonant frequency and methods of adapting sameSCHLAGE ELECTRONICS INC·Filed 1977·Granted Mar 6, 1979·37 cites·22 claims
- 1585US4600829AElectronic proximity identification and recognition system with isolated two-way couplingWALTON CHARLES A·Filed 1984·Granted Jul 15, 1986·111 cites·12 claims
- 1682US4202350ADevice for measuring pulse, breathing and running rate for joggersWALTON CHARLES A·Filed 1978·Granted May 13, 1980·96 cites·3 claims
- 1778US4459474AIdentification system with separation and direction capability and improved noise rejectionWALTON CHARLES A·Filed 1981·Granted Jul 10, 1984·74 cites·6 claims
- 1873US4656472AProximity identification system with power aided identifierWALTON CHARLES A·Filed 1985·Granted Apr 7, 1987·93 cites·24 claims
- 1971US12309288B2Systems and methods for use in appending log entries to data structuresMASTERCARD INTERNATIONAL INC·Filed 2024·Granted May 20, 2025·0 cites·19 claims
- 2066US5342116AProgrammer's anti-slump chair with knee supportWALTON CHARLES A·Filed 1992·Granted Aug 30, 1994·33 cites·20 claims
- 2166US3970824AElectronic recognition and identification system for identifying a family of codesSCHLAGE ELECTRONICS INC·Filed 1975·Granted Jul 20, 1976·29 cites·9 claims
- 2265US5021778ACapacitance coupled proximity identification systemWALTON CHARLES A·Filed 1989·Granted Jun 4, 1991·62 cites·10 claims
- 2364US6340116B1Proximity card with incorporated pin code protectionFiled 1999·Granted Jan 22, 2002·84 cites·36 claims
- 2463US6742714B2Proximity card with incorporated PIN code protectionFiled 2002·Granted Jun 1, 2004·11 cites·20 claims
- 2560US11991292B2Systems and methods for use in appending log entries to data structuresMASTERCARD INTERNATIONAL INC·Filed 2021·Granted May 21, 2024·0 cites·19 claims
- 2658US5159332AProximity identification system with flux concentration in operating regionWALTON CHARLES A·Filed 1991·Granted Oct 27, 1992·29 cites·2 claims
- 2758US4307728APortable device for measuring heartbeat rate with compensation for extraneous signalsWALTON CHARLES A·Filed 1979·Granted Dec 29, 1981·30 cites·2 claims
- 2853US2007093367A1Back treatment with slant table and user adjustmentsWALTON CHARLES A·Filed 2005·Application pending·0 cites
- 2952US2006152364A1RFID with field changeable identificationWALTON CHARLES A·Filed 2004·Application pending·0 cites
- 3050US2007017558A1Surface cleaner with multiple angled orificesWALTON CHARLES A·Filed 2005·Application pending·0 cites
- 3148US10873853B2Systems and methods for managing digital identities associated with usersMASTERCARD INTERNATIONAL INC·Filed 2019·Granted Dec 22, 2020·0 cites·16 claims
- 3248US2007093323A1Ball for racquetball with training markingsWALTON CHARLES A·Filed 2005·Application pending·0 cites
- 3348US2005219951A1Finding underground animals using transducer probesWALTON CHARLES A·Filed 2004·Application pending·0 cites
- 3447US2004194237A1Underwater cleaning apparatus using suction gripFiled 2003·Application pending·0 cites
- 3546US5896215AMulti-channel system with multiple information sourcesFiled 1996·Granted Apr 20, 1999·23 cites·4 claims
- 3645US2002073493A1System for cleaning underwater surfaces, improvements and variationsFiled 2000·Application pending·0 cites
- 3744US2022277295A1Systems and methods for use in managing complex user credentialsMASTERCARD INTERNATIONAL INC·Filed 2021·Application pending·0 cites
- 3843US5022099ARadiation helmetWALTON CHARLES A·Filed 1990·Granted Jun 11, 1991·25 cites·4 claims
- 3942US4888474AProximity identification system with lateral flux magnetic rod couplingWALTON CHARLES A·Filed 1988·Granted Dec 19, 1989·8 cites·31 claims
- 4042US2021049588A1Systems and methods for use in provisioning tokens associated with digital identitiesMASTERCARD INTERNATIONAL INC·Filed 2020·Application pending·0 cites
- 4139US2004133999A1Underwater cleaning and scrubbing apparatusFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →