Number | Date | Country | Kind |
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1-021837 | Jan 1989 | JPX |
Number | Name | Date | Kind |
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4581411 | Liang et al. | Apr 1986 | |
4797448 | Liang | Jan 1989 |
Number | Date | Country |
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0142825 | May 1985 | EPX |
Entry |
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Annex to the European Search Report on European Patent Application No. EP 90 10 1520. |