Inventor · disambiguated record
Johann Mattfeld
Also filed as: MATTFELD JOHANN
7 granted patents·43 citations·filing 1975–1988
82Inventor score
Top patents by PatentIndex Score
7 records- 0164US4227156ACircuit for at least two frequenciesLICENTIA GMBH·Filed 1978·Granted Oct 7, 1980·12 cites·11 claims
- 0251US4879522AIntegrated complementary push-pull B final stageTELEFUNKEN ELECTRONIC GMBH·Filed 1988·Granted Nov 7, 1989·10 cites·4 claims
- 0348US3988695AProtection circuit for output stage of low frequency amplifiersLICENTIA GMBH·Filed 1975·Granted Oct 26, 1976·7 cites·2 claims
- 0441US4302719ACircuit for controlling a current source transistorLICENTIA GMBH·Filed 1980·Granted Nov 24, 1981·5 cites·8 claims
- 0538US4313221AMixer/oscillator circuitLICENTIA GMBH·Filed 1980·Granted Jan 26, 1982·6 cites·2 claims
- 0621US4453135AAmplifier circuit arrangement having two amplifiers with respectively different electrical propertiesMATTFELD JOHANN·Filed 1982·Granted Jun 5, 1984·3 cites·9 claims
- 0718US4799027ALow-frequency amplifierTELEFUNKEN ELECTRONIC GMBH·Filed 1987·Granted Jan 17, 1989·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →