Assignee
LEEDS & NORTHRUP CO
59 granted patents·1,985 citations·filing 1971–1984
Top patents by PatentIndex Score
59 records- 0195US4368510AAutomatic identification system for self tuning process controllerLEEDS & NORTHRUP CO·Filed 1980·Granted Jan 11, 1983·120 cites·12 claims
- 0295US4076596AApparatus for electrolytically determining a species in a fluid and method of useLEEDS & NORTHRUP CO·Filed 1976·Granted Feb 28, 1978·576 cites·10 claims
- 0394US4429343AHumidity sensing elementLEEDS & NORTHRUP CO·Filed 1981·Granted Jan 31, 1984·92 cites·4 claims
- 0493US4111717ASmall-size high-performance radiation thermopileLEEDS & NORTHRUP CO·Filed 1977·Granted Sep 5, 1978·59 cites·9 claims
- 0592US4375056AThin film resistance thermometer device with a predetermined temperature coefficent of resistance and its method of manufactureLEEDS & NORTHRUP CO·Filed 1980·Granted Feb 22, 1983·47 cites·5 claims
- 0689US4407013ASelf tuning of P-I-D controller by conversion of discrete time model identification parametersLEEDS & NORTHRUP CO·Filed 1980·Granted Sep 27, 1983·57 cites·14 claims
- 0789US4265538AOptical sample cell for analysis of particles in liquid suspensionLEEDS & NORTHRUP CO·Filed 1979·Granted May 5, 1981·49 cites·8 claims
- 0889US3998591ASpectrochemical analyzer using surface-bound color reagentsLEEDS & NORTHRUP CO·Filed 1975·Granted Dec 21, 1976·71 cites·11 claims
- 0988US3973184AThermocouple circuit detector for simultaneous analog trend recording and analog to digital conversionLEEDS & NORTHRUP CO·Filed 1975·Granted Aug 3, 1976·71 cites·7 claims
- 1088US3937615AAuto-ranging glucose measuring systemLEEDS & NORTHRUP CO·Filed 1974·Granted Feb 10, 1976·78 cites·12 claims
- 1187US4037965AMethod and optical means for determining dimensional characteristics of the particle distribution in a collection of particlesLEEDS & NORTHRUP CO·Filed 1976·Granted Jul 26, 1977·52 cites·12 claims
- 1283US3939459ADigital signal linearizerLEEDS & NORTHRUP CO·Filed 1974·Granted Feb 17, 1976·33 cites·2 claims
- 1379US4390925AMultiple-cavity variable capacitance pressure transducerLEEDS & NORTHRUP CO·Filed 1981·Granted Jun 28, 1983·32 cites·11 claims
- 1475US4052600AMeasurement of statistical parameters of a distribution of suspended particlesLEEDS & NORTHRUP CO·Filed 1975·Granted Oct 4, 1977·27 cites·5 claims
- 1574US4473889ARemote correlation of sequence of eventsLEEDS & NORTHRUP CO·Filed 1981·Granted Sep 25, 1984·27 cites·2 claims
- 1671US4278052ABoiler control systemLEEDS & NORTHRUP CO·Filed 1979·Granted Jul 14, 1981·20 cites·4 claims
- 1771US4134679ADetermining the volume and the volume distribution of suspended small particlesLEEDS & NORTHRUP CO·Filed 1976·Granted Jan 16, 1979·22 cites·22 claims
- 1868US4375663APower failure early warning circuit for microprocessor with CMOS RAM memoryLEEDS & NORTHRUP CO·Filed 1980·Granted Mar 1, 1983·36 cites·2 claims
- 1968US3950992AImmersion sampler for molten metalLEEDS & NORTHRUP CO·Filed 1975·Granted Apr 20, 1976·25 cites·14 claims
- 2067US4090746APress fit bearing retaining bearing size when inserted into supportLEEDS & NORTHRUP CO·Filed 1977·Granted May 23, 1978·24 cites·4 claims
- 2166US4337456AAnalog to digital converter with offset error correctionLEEDS & NORTHRUP CO·Filed 1979·Granted Jun 29, 1982·17 cites·3 claims
- 2266US4167335AApparatus and method for linearizing a volume loading measurement utilizing particle scatteringLEEDS & NORTHRUP CO·Filed 1977·Granted Sep 11, 1979·22 cites·8 claims
- 2365US4333352AInjection-molded Doppler flowmeter transducer assemblyLEEDS & NORTHRUP CO·Filed 1980·Granted Jun 8, 1982·20 cites·14 claims
- 2465US4105509ACombination measuring and reference potential electrode and method of measuring ph in samples subject to large voltage gradientsLEEDS & NORTHRUP CO·Filed 1977·Granted Aug 8, 1978·27 cites·12 claims
- 2564US4034610ADifferential pressure measuring deviceLEEDS & NORTHRUP CO·Filed 1976·Granted Jul 12, 1977·19 cites·6 claims
- 2663US4008386AMethod and means for producing a control signal for process control including removable means for increasing gain as a time integral of errorLEEDS & NORTHRUP CO·Filed 1976·Granted Feb 15, 1977·17 cites·19 claims
- 2761US4274284AExpandable phase change detector deviceLEEDS & NORTHRUP CO·Filed 1980·Granted Jun 23, 1981·21 cites·6 claims
- 2860US4271473AControl of parallel operated turbines in cogenerationLEEDS & NORTHRUP CO·Filed 1979·Granted Jun 2, 1981·11 cites·2 claims
- 2959US3946211AAmplitude limited filterLEEDS & NORTHRUP CO·Filed 1974·Granted Mar 23, 1976·13 cites·1 claims
- 3057US4245914ASample cell window cleaning deviceLEEDS & NORTHRUP CO·Filed 1980·Granted Jan 20, 1981·19 cites·5 claims
- 3154US4050065ADual slope analog to digital converter with delay compensationLEEDS & NORTHRUP CO·Filed 1975·Granted Sep 20, 1977·11 cites·5 claims
- 3254US3972681AFlow-through thermal detectorLEEDS & NORTHRUP CO·Filed 1975·Granted Aug 3, 1976·15 cites·2 claims
- 3353US4390796AVoltage to duty cycle converterLEEDS & NORTHRUP CO·Filed 1981·Granted Jun 28, 1983·10 cites·8 claims
- 3453US3980543AElectrochemical cell structureLEEDS & NORTHRUP CO·Filed 1974·Granted Sep 14, 1976·10 cites·10 claims
- 3552US4417303AMulti-processor data communication bus structureLEEDS & NORTHRUP CO·Filed 1981·Granted Nov 22, 1983·22 cites·3 claims
- 3652US4315211APreamplifier for voltage measuring instrument with non-interacting zero and span controlsLEEDS & NORTHRUP CO·Filed 1980·Granted Feb 9, 1982·12 cites·6 claims
- 3751US4037964AMethod and apparatus for measuring the sum of the radii of particles in a collectionLEEDS & NORTHRUP CO·Filed 1976·Granted Jul 26, 1977·13 cites·3 claims
- 3850US4280365AUltrasonic Doppler flowmeter with correction for vibratory signals at zero-flow conditionsLEEDS & NORTHRUP CO·Filed 1979·Granted Jul 28, 1981·11 cites·7 claims
- 3949US4492948AFast response surface contact temperature sensorLEEDS & NORTHRUP CO·Filed 1981·Granted Jan 8, 1985·18 cites·10 claims
- 4049US4114446ATemperature measurement with three lead resistance thermometersLEEDS & NORTHRUP CO·Filed 1976·Granted Sep 19, 1978·11 cites·6 claims
- 4148US4374351ADigital drive unit regulatorLEEDS & NORTHRUP CO·Filed 1980·Granted Feb 15, 1983·17 cites·6 claims
- 4248US4041404AApparatus and method for detecting when a measured variable represented by a string of digital pulses reaches a plateauLEEDS & NORTHRUP CO·Filed 1976·Granted Aug 9, 1977·12 cites·6 claims
- 4347US4385362AFilter arrangement for elimination of unwanted bias in a model reference process control systemLEEDS & NORTHRUP CO·Filed 1980·Granted May 24, 1983·12 cites·9 claims
- 4447US4229230AExpendable immersion thermocoupleLEEDS & NORTHRUP CO·Filed 1978·Granted Oct 21, 1980·11 cites·5 claims
- 4545US4469717AThin film resistance thermometer with a predetermined temperature coefficient of resistance and its method of manufactureLEEDS & NORTHRUP CO·Filed 1981·Granted Sep 4, 1984·6 cites·9 claims
- 4643US3953188AControl system for mold cooling in glass forming machineLEEDS & NORTHRUP CO·Filed 1975·Granted Apr 27, 1976·11 cites·6 claims
- 4742US3941665ACation concentration measurementsLEEDS & NORTHRUP CO·Filed 1971·Granted Mar 2, 1976·11 cites·2 claims
- 4840US4115785AOpen circuit detector for multipoint recorderLEEDS & NORTHRUP CO·Filed 1977·Granted Sep 19, 1978·8 cites·4 claims
- 4939US4168220AMethod for detecting the fouling of a membrane covered electrochemical cellLEEDS & NORTHRUP CO·Filed 1978·Granted Sep 18, 1979·8 cites·6 claims
- 5038US4419733ATime deviation and inadvertent interchange correction for automatic generation controlLEEDS & NORTHRUP CO·Filed 1981·Granted Dec 6, 1983·5 cites·4 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
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