Assignee
QUALITROL CORP
24 granted patents·1 pending application·384 citations·filing 1975–2005
Top patents by PatentIndex Score
25 records- 0186US3960017AThermometer insertable in winding of fluid cooled transformerQUALITROL CORP·Filed 1975·Granted Jun 1, 1976·46 cites·5 claims
- 0285US7377689B2Transformer temperature monitoring and controlQUALITROL CORP·Filed 2005·Granted May 27, 2008·19 cites·20 claims
- 0372US4676266APressure relief deviceQUALITROL CORP·Filed 1982·Granted Jun 30, 1987·29 cites·3 claims
- 0467US5937893AShield for pressure relief deviceQUALITROL CORP·Filed 1997·Granted Aug 17, 1999·26 cites·33 claims
- 0566US4733974ATransformer life consumption indicatorQUALITROL CORP·Filed 1986·Granted Mar 29, 1988·30 cites·2 claims
- 0665US4823224ARapid pressure rise circuitQUALITROL CORP·Filed 1988·Granted Apr 18, 1989·24 cites·5 claims
- 0765USD287701SElectronic temperature monitorQUALITROL CORP·Filed 1984·Granted Jan 13, 1987·10 cites·1 claims
- 0865US4431023APressure relief deviceQUALITROL CORP·Filed 1983·Granted Feb 14, 1984·21 cites·3 claims
- 0964US4074096ABellows controlled sudden pressure rise relayQUALITROL CORP·Filed 1976·Granted Feb 14, 1978·12 cites·5 claims
- 1063US6497248B2Pressure relief device with one piece gasketQUALITROL CORP·Filed 2001·Granted Dec 24, 2002·12 cites·25 claims
- 1163US4843187AGasket assembly and electrical power transformer including the sameQUALITROL CORP·Filed 1988·Granted Jun 27, 1989·17 cites·2 claims
- 1263US4754405ATri-phase electronic temperature controllerQUALITROL CORP·Filed 1986·Granted Jun 28, 1988·26 cites·11 claims
- 1361US4092864AHot spot thermometerQUALITROL CORP·Filed 1976·Granted Jun 6, 1978·10 cites·6 claims
- 1460US4775245AMulti-phase electronic temperature controllerQUALITROL CORP·Filed 1986·Granted Oct 4, 1988·22 cites·13 claims
- 1555US7210497B2Pressure relief device with increased flow rateQUALITROL CORP·Filed 2003·Granted May 1, 2007·8 cites·28 claims
- 1654US3996881ARotary indicating instrument with magnetic resetQUALITROL CORP·Filed 1975·Granted Dec 14, 1976·9 cites·12 claims
- 1753US4402209ALiquid level float gauge calibration meansQUALITROL CORP·Filed 1981·Granted Sep 6, 1983·19 cites·3 claims
- 1849US4745571AModular electronic temperature controllerQUALITROL CORP·Filed 1985·Granted May 17, 1988·14 cites·11 claims
- 1949US4074095AFlow operable switch deviceQUALITROL CORP·Filed 1976·Granted Feb 14, 1978·6 cites·5 claims
- 2045US7111637B2Enclosure system for pressure relief deviceQUALITROL CORP·Filed 2003·Granted Sep 26, 2006·2 cites·33 claims
- 2143US4074696APressure relief valve operation signalQUALITROL CORP·Filed 1976·Granted Feb 21, 1978·7 cites·2 claims
- 2240US4036058AHot spot thermometerQUALITROL CORP·Filed 1976·Granted Jul 19, 1977·10 cites·5 claims
- 2336USD282393SCombined pressure relief valve and clampQUALITROL CORP·Filed 1983·Granted Jan 28, 1986·2 cites·1 claims
- 2436US2006251147A1Transformer temperature monitoring and controlQUALITROL CORP·Filed 2005·Application pending·0 cites
- 2525US4717882ASnap over lens assemblyQUALITROL CORP·Filed 1985·Granted Jan 5, 1988·3 cites·2 claims
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