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5440451 | Saito et al. | Aug 1995 | A |
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5912504 | Yoshizawa | Jun 1999 | A |
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0493051 | Jul 1992 | EP |
0582881 | Feb 1994 | EP |
63021878 | Jan 1988 | JP |
2002150 | Jan 1990 | JP |
Entry |
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