Willinger; Brothers, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5304003 Stick-on aquarium thermometers and the likeExpiredJun 23, 93Apr 19, 94[G01K]
5290157 Clamp for attaching an aquarium power headExpiredMar 11, 93Mar 01, 94[F04B]
5282961 Floating impeller assemblyExpiredJun 23, 93Feb 01, 94[A01K]
5282727 Aquarium power head with integral mufflerExpiredAug 10, 92Feb 01, 94[F04B]
5238367 Impeller assembly for aquarium power filterExpiredApr 13, 92Aug 24, 93[F04D]
D338018 Air pumpExpiredJan 14, 92Aug 03, 93[]
5137433 Aquarium power head with integral mufflerExpiredMay 29, 90Aug 11, 92[F04B]
5098585 Aquarium filter assemblyExpiredJun 03, 91Mar 24, 92[A01K]
D317966 Aquarium filterExpiredAug 15, 88Jul 02, 91[]
4975562 Heater and thermostat unitExpiredApr 06, 89Dec 04, 90[H05B, H01H]
4934187 Flow meter for insertion in aquarium filter flow tubeExpiredApr 06, 89Jun 19, 90[G01F]
D307626 Aquarium filter cartridgeExpiredOct 30, 87May 01, 90[]
4895646 External aquarium filterExpiredJun 20, 88Jan 23, 90[A01K]
4894151 Filter cartridge for an undergravel aquarium filterExpiredOct 12, 88Jan 16, 90[A01K]
4842726 Inside filter for aquariumsExpiredNov 09, 87Jun 27, 89[A01K, B01D]
4735718 Multilayer membrane separatorExpiredNov 28, 84Apr 05, 88[B01D]
D294360 Aquarium pumpExpiredJun 19, 86Feb 23, 88[]
D294172 Aquarium power filterExpiredJul 09, 86Feb 09, 88[]
4714547 Aquarium tubulesExpiredMay 05, 86Dec 22, 87[A01K]
D291720 Aquarium filter pumpExpiredMar 11, 85Sep 01, 87[]

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