Number | Date | Country | Kind |
---|---|---|---|
196 51 454 | Dec 1996 | DE |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/DE97/02407 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO98/26481 | 6/18/1998 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
4345179 | Asai et al. | Aug 1982 | A |
4393324 | Nishio et al. | Jul 1983 | A |
4414483 | Nishio et al. | Nov 1983 | A |
4427915 | Nishio et al. | Jan 1984 | A |
5304894 | Stimson | Apr 1994 | A |
6069434 | Clifford | May 2000 | A |
Number | Date | Country |
---|---|---|
39 05 315 | Aug 1990 | DE |
0 171 153 | Feb 1986 | EP |
Entry |
---|
Patent Abstracts of Japan, vol. 015, No. 514, Dec. 27, 1991 & JP 03 225785 A (NGK Spark Plug Co. Ltd.), Oct. 4, 1991. |