GRUSIN, MARTIN,AS

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5173169 Electroplating method and apparatusExpiredMay 08, 91Dec 22, 92[C25D]
5139675 Filtration cleaning systemExpiredAug 08, 90Aug 18, 92[B01D]
5113751 Beverage brewing systemExpiredMay 31, 90May 19, 92[A47J]
4963268 Method and system for variable frequency electromagnetic water treatmentExpiredFeb 21, 89Oct 16, 90[C02F, B01D]
4865748 Method and system for variable frequency electromagnetic water treatmentExpiredApr 20, 88Sep 12, 89[C02F]
4752368 System for protecting metal structures against corrosionExpiredFeb 20, 87Jun 21, 88[C23F]
4746425 Cooling system for electromagnetic water treating deviceExpiredAug 27, 86May 24, 88[C02F]
4659479 Electromagnetic water treating deviceExpiredDec 19, 84Apr 21, 87[B03C, C02F]

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