Number | Date | Country | Kind |
---|---|---|---|
3702393 | Jan 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4703047 | Petersen et al. | Oct 1987 | |
4705788 | Schriewer et al. | Nov 1987 |
Number | Date | Country |
---|---|---|
0167763 | Jan 1986 | EPX |
Entry |
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Patent Abstracts of Japan, Band 4, Nr. 155(C-29) [637], 29, Oct. 1980; & JP-A-55 100 364 (Dianippon Seiyaku K.K.) 31.07.1980. |