FIRMA FILTERWERK MANN & HUMMEL GMBH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4436535 Method and device for removing soot from exhaust gasesExpiredMar 22, 82Mar 13, 84[B01D]
4418662 Engine air intake filter with fumes-absorbing substanceExpiredJul 10, 81Dec 06, 83[F02M, B01D]
4373499 Ventilation check valve for internal combustion enginesExpiredAug 21, 81Feb 15, 83[F02M]

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