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4166872 | Karpik et al. | Sep 1979 | |
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---|---|---|
255859 | Feb 1988 | EP |
WO 94 25522 | Nov 1994 | WO |
WO 96 23023 | Aug 1996 | WO |
WO 98 53979 | Dec 1998 | WO |
Entry |
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Derwent Publications Ltd, XP002131032 and JP 57 111265 A, (Jul. 10, 1982). |
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