Inventor · disambiguated record
Heinrich Pfeifer
Also filed as: PFEIFER HEINRICH
8 granted patents·299 citations·filing 1978–1989
90Inventor score
Top patents by PatentIndex Score
8 records- 0191US4947171ACircuit arrangement for averaging signals during pulse-density D/A or A/D conversionITT IND GMBH DEUTSCHE·Filed 1989·Granted Aug 7, 1990·74 cites·13 claims
- 0290US4757390AVideo recorder with a magnetic recording medium in the form of a tapeITT IND GMBH DEUTSCHE·Filed 1985·Granted Jul 12, 1988·86 cites·16 claims
- 0387US4872129ADigital decimation filterITT IND GMBH DEUTSCHE·Filed 1988·Granted Oct 3, 1989·43 cites·7 claims
- 0480US4228519AMonitoring method and system for a parking lotKIENZLE APPARATE GMBH·Filed 1978·Granted Oct 14, 1980·27 cites·15 claims
- 0564US4707666AFrequency demodulator circuit with zero-crossing counterITT IND GMBH DEUTSCHE·Filed 1986·Granted Nov 17, 1987·22 cites·5 claims
- 0661US5202766ASound channel circuit for digital television receiversITT IND GMBH DEUTSCHE·Filed 1987·Granted Apr 13, 1993·18 cites·6 claims
- 0760US4561115ADecoder for traffic information regional tone signalsITT·Filed 1984·Granted Dec 24, 1985·16 cites·12 claims
- 0851US4633517ACircuit for decoding traffic information message tone signalsITT IND GMBH DEUTSCHE·Filed 1985·Granted Dec 30, 1986·13 cites·2 claims
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