Inventor · disambiguated record
Frank A. Ludwig
Also filed as: LUDWIG FRANK · LUDWIG FRANK A
52 granted patents·1,148 citations·filing 1975–2020
99Inventor score
Files withHUGHES AIRCRAFT CO27FORD MOTOR CO15LUDWIG FRANK4DEUTSCHES ELEKTRONEN SYNCHR1KELLER HOLDING GMBH1
Top patents by PatentIndex Score
52 records- 0194US4865925AGas permeable electrode for electrochemical systemHUGHES AIRCRAFT CO·Filed 1988·Granted Sep 12, 1989·85 cites·28 claims
- 0289US4631116AMethod of monitoring trace constituents in plating bathsHUGHES AIRCRAFT CO·Filed 1985·Granted Dec 23, 1986·74 cites·21 claims
- 0386US4002807AAlkali metal, sulfur battery or cell with single phase sulfur electrodeFORD MOTOR CO·Filed 1975·Granted Jan 11, 1977·39 cites·7 claims
- 0486US3993503ASecondary battery or cell with composite electrodeFORD MOTOR CO·Filed 1976·Granted Nov 23, 1976·40 cites·31 claims
- 0584US5252192AElectrolytic pumpHUGHES AIRCRAFT CO·Filed 1992·Granted Oct 12, 1993·50 cites·15 claims
- 0683US5315162AElectrochemical synapses for artificial neural networksHUGHES AIRCRAFT CO·Filed 1991·Granted May 24, 1994·55 cites·22 claims
- 0783US3980496AEnergy conversion devices with improved electrode shapesFORD MOTOR CO·Filed 1975·Granted Sep 14, 1976·37 cites·44 claims
- 0882US4738904ALow temperature thermoelectrochemical system and methodHUGHES AIRCRAFT CO·Filed 1986·Granted Apr 19, 1988·49 cites·44 claims
- 0978US4084041ASecondary battery or cell with polysulfide wettable electrode - #2FORD MOTOR CO·Filed 1977·Granted Apr 11, 1978·24 cites·11 claims
- 1075US4977044ASodium-sulfur thermal batteryHUGHES AIRCRAFT CO·Filed 1989·Granted Dec 11, 1990·33 cites·16 claims
- 1175US4248943ASodium sulfur container with chromium/chromium oxide coatingFORD MOTOR CO·Filed 1980·Granted Feb 3, 1981·27 cites·7 claims
- 1274US5391271AMethod of monitoring acid concentration in plating bathsHUGHES AIRCRAFT CO·Filed 1993·Granted Feb 21, 1995·37 cites·11 claims
- 1373US4810596ASulfuric acid thermoelectrochemical system and methodHUGHES AIRCRAFT CO·Filed 1985·Granted Mar 7, 1989·28 cites·8 claims
- 1473US3951689AAlkali metal/sulfur cell with gas fuel cell electrodeFORD MOTOR CO·Filed 1975·Granted Apr 20, 1976·26 cites·27 claims
- 1572US8223911B2Self-compensating drift-free high-frequency phase detector circuitLUDWIG FRANK·Filed 2007·Granted Jul 17, 2012·6 cites·22 claims
- 1672US3994745ASecondary battery with separate charge and discharge zonesFORD MOTOR CO·Filed 1976·Granted Nov 30, 1976·18 cites·31 claims
- 1771US3966492ASodium sulfur battery or cell with improved ampere-hour capacityFORD MOTOR CO·Filed 1975·Granted Jun 29, 1976·25 cites·12 claims
- 1870US5470669AThermoelectrochemical system and methodHUGHES AIRCRAFT CO·Filed 1989·Granted Nov 28, 1995·31 cites·22 claims
- 1970US4939469ANon-destructive method for evaluation of printed wiring boardsHUGHES AIRCRAFT CO·Filed 1988·Granted Jul 3, 1990·24 cites·19 claims
- 2070US4766522AElectrochemical capacitorHUGHES AIRCRAFT CO·Filed 1987·Granted Aug 23, 1988·18 cites·25 claims
- 2167US5755954AMethod of monitoring constituents in electroless plating bathsTECHNIC·Filed 1996·Granted May 26, 1998·35 cites·14 claims
- 2263US5296123AIn-tank electrochemical sensorHUGHES AIRCRAFT CO·Filed 1992·Granted Mar 22, 1994·26 cites·18 claims
- 2363US3985575ASecondary battery or cell with dual electrodeFORD MOTOR CO·Filed 1976·Granted Oct 12, 1976·16 cites·24 claims
- 2461US5753101AMethod of monitoring constituents in conversion coating bathsFiled 1996·Granted May 19, 1998·23 cites·18 claims
- 2561US5324400AElectrode preconditioning method for a plating bath monitoring processHUGHES AIRCRAFT CO·Filed 1992·Granted Jun 28, 1994·23 cites·13 claims
- 2660US9472124B2Safety label covering an individual packagingLUDWIG FRANK·Filed 2010·Granted Oct 18, 2016·2 cites·16 claims
- 2760US4550036AElectroless silver plating process and systemHUGHES AIRCRAFT CO·Filed 1984·Granted Oct 29, 1985·16 cites·10 claims
- 2860US4084042ASecondary battery or cell with polysulfide wettable electrode #1FORD MOTOR CO·Filed 1977·Granted Apr 11, 1978·12 cites·12 claims
- 2959US5304430AAcid-base concentration cell for electric power generationHUGHES AIRCRAFT CO·Filed 1993·Granted Apr 19, 1994·28 cites·29 claims
- 3059US4166156ASecondary battery or cell with pyrolytic graphite coated graphite current collectorFORD MOTOR CO·Filed 1977·Granted Aug 28, 1979·13 cites·11 claims
- 3158US8978890B2Security label for protecting medicaments contained in an individual packagingLUDWIG FRANK·Filed 2010·Granted Mar 17, 2015·2 cites·22 claims
- 3258US8865283B2Security label for securing medications retained in an individual packagingLUDWIG FRANK·Filed 2010·Granted Oct 21, 2014·1 cites·9 claims
- 3357US5208112AThermally regenerated fuel cellHUGHES AIRCRAFT CO·Filed 1991·Granted May 4, 1993·21 cites·23 claims
- 3457US4616596AElectroless plating apparatusHUGHES AIRCRAFT CO·Filed 1985·Granted Oct 14, 1986·18 cites·11 claims
- 3556US5298132AMethod for monitoring purification treatment in plating bathsHUGHES AIRCRAFT CO·Filed 1993·Granted Mar 29, 1994·19 cites·14 claims
- 3656US5290423AElectrochemical interconnectionHUGHES AIRCRAFT CO·Filed 1992·Granted Mar 1, 1994·25 cites·14 claims
- 3755US4117208AElectrical conversion device with ceramic electrodeFORD MOTOR CO·Filed 1977·Granted Sep 26, 1978·12 cites·9 claims
- 3853US5336380AMethod of monitoring major constituents in plating bathsHUGHES AIRCRAFT CO·Filed 1993·Granted Aug 9, 1994·17 cites·15 claims
- 3950US4048394ASecondary battery or cell with vitreous carbon coated graphite current collectorFORD MOTOR CO·Filed 1977·Granted Sep 13, 1977·10 cites·15 claims
- 4048US5324399AMethod and system for monitoring quality of phosphate coatingHUGHES AIRCRAFT CO·Filed 1992·Granted Jun 28, 1994·13 cites·17 claims
- 4147US5287060AIn-tank conductivity sensorHUGHES AIRCRAFT CO·Filed 1992·Granted Feb 15, 1994·12 cites·23 claims
- 4247US4038465ASodium sulfur battery or cell with external storageFORD MOTOR CO·Filed 1975·Granted Jul 26, 1977·10 cites·23 claims
- 4346US5087534AGas-recirculating electrode for electrochemical systemHUGHES AIRCRAFT CO·Filed 1990·Granted Feb 11, 1992·15 cites·22 claims
- 4446US4002806ASecondary battery or cellFORD MOTOR CO·Filed 1975·Granted Jan 11, 1977·10 cites·13 claims
- 4545US9374915B2Backplane configuration for use in electronic crate systemsDEUTSCHES ELEKTRONEN SYNCHR·Filed 2013·Granted Jun 21, 2016·0 cites·19 claims
- 4645US5320724AMethod of monitoring constituents in plating bathsHUGHES AIRCRAFT CO·Filed 1992·Granted Jun 14, 1994·12 cites·8 claims
- 4744US5298131AMethod of monitoring metal ion content in plating bathsHUGHES AIRCRAFT CO·Filed 1993·Granted Mar 29, 1994·9 cites·16 claims
- 4841US11774438B2Measurement set-up for a return cement suspension, construction site arrangement having a measurement set-up as well as method and useKELLER HOLDING GMBH·Filed 2020·Granted Oct 3, 2023·0 cites·15 claims
- 4940US5298130AMethod of monitoring major constituents in plating baths containing codepositing constituentsHUGHES AIRCRAFT CO·Filed 1992·Granted Mar 29, 1994·8 cites·11 claims
- 5037US4640119AUtility pole testerP T E INC·Filed 1985·Granted Feb 3, 1987·10 cites·12 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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