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27 46 612 | Apr 1979 | DE |
0 440 184 | Aug 1991 | EP |
2 041 411 | Sep 1980 | GB |
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53-46426 | Apr 1978 | JP |
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62-70541 | Apr 1987 | JP |
62-93325 | Apr 1987 | JP |
64-68908 | Mar 1989 | JP |
7-242965 | Sep 1995 | JP |
10-17956 | Jan 1998 | JP |
WO9946415 | Sep 1999 | WO |
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