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| Number | Date | Country |
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| 47-13189 | Oct 1972 | JP |
| 48-90886 | Nov 1973 | JP |
| 48-97659 | Dec 1973 | JP |
| 49-106590 | Sep 1974 | JP |
| 54-13783 | Jan 1979 | JP |
| 522478 | Jan 1980 | JP |
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| 58-136081 | Sep 1983 | JP |
| 59-70647 | May 1984 | JP |
| 61-18774 | Feb 1986 | JP |
| 4-122283 | Apr 1992 | JP |
| 861697 | Feb 1993 | JP |
| 6-292771 | Oct 1994 | JP |
| 9-285661 | Nov 1997 | JP |
| 999927 | Jan 1998 | JP |
| 1026211 | Nov 1998 | JP |
| 2001-232080 | Aug 2001 | JP |
| 2001-1232080 | Aug 2001 | JP |
| 1189697 | Nov 2003 | JP |
| 2005-304965 | Nov 2005 | JP |
| 2006-212249 | Aug 2006 | JP |
| 1361354 | Jun 2009 | JP |