AB Bahco Ventilation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4974386 Frame structure with profile members and engagement rodsExpiredJul 21, 88Dec 04, 90[A47B, F16B]
4805521 Supply air deviceExpiredJan 07, 88Feb 21, 89[F24F]
4782637 Frame structureExpiredMar 31, 87Nov 08, 88[F16B, E04B]
4637302 Air supply deviceExpiredAug 16, 85Jan 20, 87[F25B]
4584929 Exhaust deviceExpiredSep 12, 84Apr 29, 86[F23J]
4377201 Arrangement in a heat recovery unitExpiredMar 05, 81Mar 22, 83[F28F]
4326913 Method and apparatus in defibrationExpiredJan 02, 80Apr 27, 82[D21B, D21C]
4227903 Filter cell apparatusExpiredAug 31, 78Oct 14, 80[B01D]

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