Number | Date | Country | Kind |
---|---|---|---|
MI2000A2193 | Oct 2000 | IT |
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4158645 | Magistro | Jun 1979 | A |
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4820678 | Xu | Apr 1989 | A |
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5055440 | Chu et al. | Oct 1991 | A |
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Number | Date | Country |
---|---|---|
00 25901 | May 2000 | WO |