Assignee
DUERRWAECHTER E DR DODUCO
DE·23 granted patents·298 citations·filing 1974–1993
Top patents by PatentIndex Score
23 records- 0174US4910180ACatalyst and process for its preparationDUERRWAECHTER E DR DODUCO·Filed 1988·Granted Mar 20, 1990·33 cites·18 claims
- 0272US4073425AMethod of and apparatus for manufacturing double contact rivetsDUERRWAECHTER E DR DODUCO·Filed 1976·Granted Feb 14, 1978·18 cites·6 claims
- 0370US5445895AMaterial for electric contacts of silver with carbonDUERRWAECHTER E DR DODUCO·Filed 1992·Granted Aug 29, 1995·25 cites·20 claims
- 0469US5360673ASemifinished product for electric contacts made of a composite material based on silver-tin oxide and powdermetallurgical process of making said productDUERRWAECHTER E DR DODUCO·Filed 1989·Granted Nov 1, 1994·21 cites·30 claims
- 0568US4624941AProcess of manufacturing a catalyst for purifying the exhaust gases from internal combustion engines and catalyst prepared by the processDUERRWAECHTER E DR DODUCO·Filed 1985·Granted Nov 25, 1986·26 cites·18 claims
- 0666US5821632AArrangement, in particular in vehicles, for transmitting electric signals by connecting linesDUERRWAECHTER E DR DODUCO·Filed 1993·Granted Oct 13, 1998·32 cites·25 claims
- 0766US4594489AElectrical switching elementDUERRWAECHTER E DR DODUCO·Filed 1985·Granted Jun 10, 1986·20 cites·28 claims
- 0863US4639670AMagnetic field sensor comprising Wiegand wires or similar bistable magnetic elementsDUERRWAECHTER E DR DODUCO·Filed 1985·Granted Jan 27, 1987·19 cites·4 claims
- 0961US4521257AProcess of manufacturing strip coated with precious metal as a semifinished product for making electric contactsDUERRWAECHTER E DR DODUCO·Filed 1983·Granted Jun 4, 1985·12 cites·18 claims
- 1059US5023467AMethod and an interval switch comprising a circuit arrangement for controlling the interval of time between wiping movements of wipers in vehiclesDUERRWAECHTER E DR DODUCO·Filed 1988·Granted Jun 11, 1991·12 cites·23 claims
- 1154US4635227AReading head for the magnetic scanning of elongate bistable magnetic elementsDUERRWAECHTER E DR DODUCO·Filed 1984·Granted Jan 6, 1987·8 cites·8 claims
- 1250US4778958AMaterial for electric contacts having arc-quenching propertiesDUERRWAECHTER E DR DODUCO·Filed 1988·Granted Oct 18, 1988·9 cites·41 claims
- 1348US4644118AElectric power circuit breakerDUERRWAECHTER E DR DODUCO·Filed 1985·Granted Feb 17, 1987·9 cites·18 claims
- 1446US5610347AMaterial for electric contacts taking silver-tin oxide or silver-zinc oxide as basisDUERRWAECHTER E DR DODUCO·Filed 1993·Granted Mar 11, 1997·9 cites·50 claims
- 1543US5389220AApparatus for a continuous selective electrodeposition on a stripDUERRWAECHTER E DR DODUCO·Filed 1991·Granted Feb 14, 1995·11 cites·14 claims
- 1641US3932935AMethod for manufacturing a ductile silver metallic oxide semi-productDUERRWAECHTER E DR DODUCO·Filed 1974·Granted Jan 20, 1976·4 cites·9 claims
- 1740US5822674AElectrical contact material and method of making the sameDUERRWAECHTER E DR DODUCO·Filed 1993·Granted Oct 13, 1998·7 cites·10 claims
- 1836US4965689AThin, Planar shaped carrier with wiegand wiresDUERRWAECHTER E DR DODUCO·Filed 1989·Granted Oct 23, 1990·6 cites·8 claims
- 1929US4446618AProcess for the production of bi-metallic contact rivetsDUERRWAECHTER E DR DODUCO·Filed 1982·Granted May 8, 1984·4 cites·5 claims
- 2028US4862303AMagnetic instrument for reading telegraphic signalsDUERRWAECHTER E DR DODUCO·Filed 1987·Granted Aug 29, 1989·2 cites·15 claims
- 2128US4744502AProcess for the production of tri-metallic contact rivetsDUERRWAECHTER E DR DODUCO·Filed 1982·Granted May 17, 1988·4 cites·4 claims
- 2228US3935988AProcess of producing solderable composites containing AgCdODUERRWAECHTER E DR DODUCO·Filed 1974·Granted Feb 3, 1976·3 cites·1 claims
- 2327US3932936AMethod of manufacturing a ductile silver metallic oxide semi-finished product contactsDUERRWAECHTER E DR DODUCO·Filed 1974·Granted Jan 20, 1976·4 cites·7 claims
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