Inventor · disambiguated record
Klaus H. Frielinghaus
Also filed as: FRIELINGHAUS KLAUS · FRIELINGHAUS KLAUS H
13 granted patents·241 citations·filing 1976–1991
93Inventor score
Top patents by PatentIndex Score
13 records- 0187US4886226ABroken rail and/or broken rail joint bar detectionGEN SIGNAL CORP·Filed 1988·Granted Dec 12, 1989·52 cites·44 claims
- 0279US4074879ATrack signalling systemGEN SIGNAL CORP·Filed 1976·Granted Feb 21, 1978·29 cites·7 claims
- 0369US4528679AAutomatic counting system for passagesGEN SIGNAL CORP·Filed 1983·Granted Jul 9, 1985·54 cites·27 claims
- 0463US5045787AApparatus and method for measuring insulated track joint resistancesGEN SIGNAL CORP·Filed 1989·Granted Sep 3, 1991·19 cites·6 claims
- 0559US4058279AFlat wheel detectorGEN SIGNAL CORP·Filed 1976·Granted Nov 15, 1977·13 cites·5 claims
- 0658US4351504ATrack circuit principle wheel detectorGEN SIGNAL CORP·Filed 1980·Granted Sep 28, 1982·15 cites·7 claims
- 0751US5181679ARailway train speed restriction apparatusGEN RAILWAY SIGNAL CORP·Filed 1991·Granted Jan 26, 1993·17 cites·19 claims
- 0847US4878638ACombination frequency loop coupling for railway track signallingGEN SIGNAL CORP·Filed 1987·Granted Nov 7, 1989·11 cites·18 claims
- 0945US5010310AAlternating current immunized relay and method of immunizing a relay to alternating currentGEN SIGNAL CORP·Filed 1988·Granted Apr 23, 1991·7 cites·7 claims
- 1041US4053128AJointless high frequency track circuit systems for railroadsGEN SIGNAL CORP·Filed 1976·Granted Oct 11, 1977·9 cites·2 claims
- 1140US4630792ARailway wheel detectorGEN SIGNAL CORP·Filed 1985·Granted Dec 23, 1986·7 cites·17 claims
- 1235US5168257AFour terminal safety resistorFRIELINGHAUS KLAUS H·Filed 1990·Granted Dec 1, 1992·5 cites·24 claims
- 1333US4570882AVital track circuit wheel detectorGEN SIGNAL CORP·Filed 1983·Granted Feb 18, 1986·3 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →