Number | Name | Date | Kind |
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4927517 | Mizutani et al. | May 1990 | |
5217588 | Wang et al. | Jun 1993 | |
5476001 | Hoetzel et al. | Dec 1995 | |
5554269 | Joseph et al. | Sep 1996 | |
5763763 | Kato et al. | Jun 1998 | |
5780710 | Murase et al. | Jul 1998 |
Number | Date | Country |
---|---|---|
0517366 | Dec 1992 | EPX |
Entry |
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Patent abstracts of Japan, vol. 16, No. 421 (P-1414), Sept. 4, 1992 & JP 04 142455A (Osaka Gas Co. Ltd.). |