Assignee
KEITHLEY INSTRUMENTS
US·131 granted patents·19 pending applications·1,417 citations·filing 1974–2025
Top patents by PatentIndex Score
150 records- 0196US10746761B2Dynamically configurable remote instrument interfaceKEITHLEY INSTRUMENTS·Filed 2016·Granted Aug 18, 2020·32 cites·19 claims
- 0295US12306209B2High current extension for a dual-stage source measure unitKEITHLEY INSTRUMENTS·Filed 2023·Granted May 20, 2025·2 cites·20 claims
- 0392US7009486B1Low noise power transformerKEITHLEY INSTRUMENTS·Filed 2003·Granted Mar 7, 2006·85 cites·6 claims
- 0492US5594247AApparatus and method for depositing charge on a semiconductor waferKEITHLEY INSTRUMENTS·Filed 1995·Granted Jan 14, 1997·120 cites·17 claims
- 0590USD861710SDisplay screen with a graphical user interface for a measurement deviceKEITHLEY INSTRUMENTS·Filed 2017·Granted Oct 1, 2019·39 cites·1 claims
- 0689US7276893B2Automatic ranging current shuntKEITHLEY INSTRUMENTS·Filed 2005·Granted Oct 2, 2007·19 cites·7 claims
- 0789US5767693AMethod and apparatus for measurement of mobile charges with a corona screen gunKEITHLEY INSTRUMENTS·Filed 1996·Granted Jun 16, 1998·105 cites·2 claims
- 0885US9645193B2Impedance source ranging apparatus and methodKEITHLEY INSTRUMENTS·Filed 2012·Granted May 9, 2017·6 cites·6 claims
- 0985US7923985B2Active autoranging current sensing circuitKEITHLEY INSTRUMENTS·Filed 2008·Granted Apr 12, 2011·14 cites·13 claims
- 1085US5386188AIn-circuit current measurementKEITHLEY INSTRUMENTS·Filed 1993·Granted Jan 31, 1995·87 cites·14 claims
- 1184US11002761B2Probe card system for testing an integrated circuitKEITHLEY INSTRUMENTS·Filed 2017·Granted May 11, 2021·4 cites·22 claims
- 1284US7920038B1Dual shielded relayKEITHLEY INSTRUMENTS·Filed 2008·Granted Apr 5, 2011·12 cites·10 claims
- 1384US5918194AIntegrated modular measurement system having configurable firmware architecture and modular mechanical partsKEITHLEY INSTRUMENTS·Filed 1997·Granted Jun 29, 1999·82 cites·43 claims
- 1484US5834941AMobile charge measurement using corona charge and ultraviolet lightKEITHLEY INSTRUMENTS·Filed 1997·Granted Nov 10, 1998·70 cites·7 claims
- 1583US11705894B2Pulsed high current technique for characterization of device under testKEITHLEY INSTRUMENTS·Filed 2020·Granted Jul 18, 2023·1 cites·20 claims
- 1683US10962585B2Gate charge measurements using two source measure unitsKEITHLEY INSTRUMENTS·Filed 2019·Granted Mar 30, 2021·4 cites·19 claims
- 1781US7616088B1Low leakage inductance transformerKEITHLEY INSTRUMENTS·Filed 2007·Granted Nov 10, 2009·11 cites·5 claims
- 1880US10656181B2Rejection of mechanical vibration induced noise in electrical measurementsKEITHLEY INSTRUMENTS·Filed 2017·Granted May 19, 2020·3 cites·20 claims
- 1979US7853425B1Parallel testing in a per-pin hardware architecture platformKEITHLEY INSTRUMENTS·Filed 2008·Granted Dec 14, 2010·13 cites·14 claims
- 2078US12578379B2Unified measurement system for static and dynamic characterization of a device under testKEITHLEY INSTRUMENTS·Filed 2024·Granted Mar 17, 2026·0 cites·20 claims
- 2178US10462541B2Determination and rendering of scan groupsKEITHLEY INSTRUMENTS·Filed 2017·Granted Oct 29, 2019·3 cites·20 claims
- 2277US11085951B2Non-linear active shunt ammeterKEITHLEY INSTRUMENTS·Filed 2019·Granted Aug 10, 2021·1 cites·19 claims
- 2377US9453880B2Active shunt source-measure unit (SMU) circuitKEITHLEY INSTRUMENTS·Filed 2014·Granted Sep 27, 2016·3 cites·7 claims
- 2476US7872481B1Low glitch multiple form C summing node switcherKEITHLEY INSTRUMENTS·Filed 2008·Granted Jan 18, 2011·8 cites·6 claims
- 2576US7633308B1Combined pulse and DC test systemKEITHLEY INSTRUMENTS·Filed 2007·Granted Dec 15, 2009·11 cites·15 claims
- 2676US3979642AElectronic protective circuitKEITHLEY INSTRUMENTS·Filed 1974·Granted Sep 7, 1976·27 cites·13 claims
- 2775US9274145B2Active shunt ammeter apparatus and methodKEITHLEY INSTRUMENTS·Filed 2012·Granted Mar 1, 2016·5 cites·16 claims
- 2875US5644115ARelay matrix switching assemblyKEITHLEY INSTRUMENTS·Filed 1995·Granted Jul 1, 1997·28 cites·30 claims
- 2974US7240258B1Parallel test system and methodKEITHLEY INSTRUMENTS·Filed 2002·Granted Jul 3, 2007·27 cites·4 claims
- 3073US10484002B1High-speed high-resolution digital-to-analog converterKEITHLEY INSTRUMENTS·Filed 2018·Granted Nov 19, 2019·3 cites·20 claims
- 3173US7568946B1Triaxial cable with a resistive inner shieldKEITHLEY INSTRUMENTS·Filed 2007·Granted Aug 4, 2009·5 cites·8 claims
- 3273US6900649B1High frequency RF interconnect for semiconductor automatic test equipmentKEITHLEY INSTRUMENTS·Filed 2003·Granted May 31, 2005·17 cites·12 claims
- 3373US2025321261A1Test and measurement instruments and probes having an isolated outputKEITHLEY INSTRUMENTS·Filed 2025·Application pending·0 cites
- 3472US9326369B2Guarded printed circuit board islandsKEITHLEY INSTRUMENTS·Filed 2013·Granted Apr 26, 2016·2 cites·17 claims
- 3572US7616008B1Digital auto balance bridgeKEITHLEY INSTRUMENTS·Filed 2007·Granted Nov 10, 2009·7 cites·4 claims
- 3672US7508240B1Power mains zero-crossing detectorKEITHLEY INSTRUMENTS·Filed 2007·Granted Mar 24, 2009·8 cites·3 claims
- 3772US5661310ARadiation dose mapping systems and methodsKEITHLEY INSTRUMENTS·Filed 1995·Granted Aug 26, 1997·43 cites·12 claims
- 3872US2025306074A1System ground detection and auto-configurationKEITHLEY INSTRUMENTS·Filed 2025·Application pending·0 cites
- 3971USD854033SDisplay screen with a graphical user interface for a measurement deviceKEITHLEY INSTRUMENTS·Filed 2017·Granted Jul 16, 2019·14 cites·1 claims
- 4071US7855544B1AC low current probe cardKEITHLEY INSTRUMENTS·Filed 2008·Granted Dec 21, 2010·6 cites·3 claims
- 4171US7724017B2Multi-channel pulse testerKEITHLEY INSTRUMENTS·Filed 2006·Granted May 25, 2010·7 cites·5 claims
- 4271US7202676B2Source measure circuitKEITHLEY INSTRUMENTS·Filed 2005·Granted Apr 10, 2007·6 cites·4 claims
- 4371US5999002AContact check for remote sensed measurementKEITHLEY INSTRUMENTS·Filed 1997·Granted Dec 7, 1999·35 cites·8 claims
- 4470US7388366B2Test system connection system with triaxial cablesKEITHLEY INSTRUMENTS·Filed 2006·Granted Jun 17, 2008·6 cites·10 claims
- 4570US5039934AControl for voltage/current source with current/voltage limitingKEITHLEY INSTRUMENTS·Filed 1990·Granted Aug 13, 1991·31 cites·7 claims
- 4669US7834641B1Phase-gain calibration of impedance/admittance meterKEITHLEY INSTRUMENTS·Filed 2007·Granted Nov 16, 2010·5 cites·6 claims
- 4769US7683650B1Measurement instrument with synchronized interference signalsKEITHLEY INSTRUMENTS·Filed 2007·Granted Mar 23, 2010·6 cites·7 claims
- 4869US5886530ATest contact connection checking method and circuitKEITHLEY INSTRUMENTS·Filed 1997·Granted Mar 23, 1999·32 cites·8 claims
- 4969US2026056809A1Scalable hardware event routing in an expandable systemKEITHLEY INSTRUMENTS·Filed 2025·Application pending·0 cites
- 5068USD917523SMeasurement device display screen with a graphical user interfaceKEITHLEY INSTRUMENTS·Filed 2018·Granted Apr 27, 2021·9 cites·1 claims
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