Number | Date | Country | Kind |
---|---|---|---|
9026538 | Dec 1990 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
4652533 | Jolley | Mar 1987 | |
4880548 | Pall et al. | Nov 1989 | |
4923620 | Pall | May 1990 | |
4925572 | Pall | May 1990 | |
4933276 | Baret | Jun 1990 | |
4948975 | Erwin et al. | Aug 1990 | |
5043141 | Wilson et al. | Aug 1991 | |
5057431 | Lubbers et al. | Oct 1991 | |
5096809 | Chen et al. | Mar 1992 |
Number | Date | Country |
---|---|---|
0101398 | Feb 1984 | EPX |
0335244 | May 1990 | EPX |
2804117 | Aug 1978 | DEX |
8807584 | Oct 1988 | WOX |
Entry |
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Patent Abstracts of Japan, vol. 14, No. 232 (C-0719), May 17, 1990; & JP-A-2057197 (Japan Organo Co., Ltd.) Feb. 26, 1990. |