Assignee
WALTER HENGST GMBH & CO KG FA
DE·6 granted patents·402 citations·filing 1996–2000
Top patents by PatentIndex Score
6 records- 0195US5770054AFluid filter with filter bypass valve and sealing surface on filter element sideWALTER HENGST GMBH & CO KG FA·Filed 1996·Granted Jun 23, 1998·136 cites·23 claims
- 0293US6348103B1Method for cleaning electrofilters and electrofilters with a cleaning deviceWALTER HENGST GMBH & CO KG FA·Filed 1999·Granted Feb 19, 2002·125 cites·15 claims
- 0384US5911213AProcess for operating an electric filter for a crankcase ventilatorWALTER HENGST GMBH & CO KG FA·Filed 1996·Granted Jun 15, 1999·77 cites·2 claims
- 0471USRE38917EFluid filter with filter bypass valve and sealing surface on filter element sideWALTER HENGST GMBH & CO KG FA·Filed 2000·Granted Dec 13, 2005·15 cites·35 claims
- 0559US6090283AFilter drain with spring enclosureWALTER HENGST GMBH & CO KG FA·Filed 1997·Granted Jul 18, 2000·31 cites·9 claims
- 0654US6599144B1Sealed testable electrical contact arrangementWALTER HENGST GMBH & CO KG FA·Filed 1999·Granted Jul 29, 2003·18 cites·9 claims
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