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| Number | Title | Issue Date |
| 5888456 | Catalytic converter A catalytic converter includes a housing, a honeycomb heater fixed to inside the housing, and a catalytic element disposed downstream of the honeycomb heater. The honeycomb heater has a first honeycomb structure made of metal having a first partition wall... | 03/30/1999 |
| 5861611 | Electrically heatable honeycomb body and honeycomb unit comprising said honeycomb body An electrically heatable honeycomb body includes a large number of passages which are defined by partition walls made of an electroconductive material and which are substantially parallel to the direction of a gas flowing through the honeycomb body, and t... | 01/19/1999 |
