Environmental Research Institute

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7901489 Electrostatic precipitator with high efficiencyExpiredAug 09, 06Mar 08, 11[B03C]
5721270 Drugs for allergic and eosinophilic diseasesExpiredSep 12, 95Feb 24, 98[A01N]
4872051 Collision avoidance alarm systemExpiredOct 01, 87Oct 03, 89[H06N]
4824248 Stabilized sensor deviceExpiredDec 21, 87Apr 25, 89[G01N]
4783753 System for reducing speckle noiseExpiredMay 07, 86Nov 08, 88[G06F, H03F]
4692765 Adaptive learning controller for synthetic aperture radarExpiredDec 05, 85Sep 08, 87[G01S, G01C]
4442543 Bit enable circuitry for an image analyzer systemExpiredAug 12, 81Apr 10, 84[G06K]

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