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198 39 987 | Sep 1998 | DE |
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5430274 | Couffet et al. | Jul 1995 | A |
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25 44 275 | Jan 1975 | DE |
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0 896 228 | Jul 1998 | EP |
Entry |
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Printout of Online Abstract for Japanese Patent 55-70015, 5/80. |