Marelco Power Systems, Inc.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5754034 Electrically controllable inductorExpiredJun 04, 96May 19, 98[G05F, H01F]
5523673 Electrically controllable inductorExpiredMar 04, 94Jun 04, 96[G05F, H01F]
D339323 Lighting transformer disconnectExpiredAug 23, 91Sep 14, 93[]
D334732 Transformer assembly for power supplyExpiredMay 18, 89Apr 13, 93[]
5051867 Transformer assembly with exposed laminations and hollow housingsExpiredJun 19, 90Sep 24, 91[H05K]
D314367 Electronic power supply housingExpiredJan 04, 89Feb 05, 91[]
4956745 Transformer assembly with exposed laminations and hollow housingsExpiredMay 10, 89Sep 11, 90[H05K]
D297829 Electronic power supply housingExpiredMay 20, 85Sep 27, 88[]
4703158 High frequency welding systemExpiredMar 31, 86Oct 27, 87[B23K]
D290456 TransformerExpiredOct 02, 84Jun 23, 87[]
4584551 Transformer having bow loop in tubular windingExpiredSep 24, 84Apr 22, 86[H01F]
4577085 System of transformers for a welding apparatusExpiredJan 20, 84Mar 18, 86[B23K]
4577175 Transformer with fluid cooled windingsExpiredJun 27, 84Mar 18, 86[H01F]
4496821 Transformer for robot armsExpiredAug 06, 82Jan 29, 85[B23K, H01F]

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