| Number | Date | Country | Kind |
|---|---|---|---|
| 87305787 | Aug 1998 | TWX |
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|---|---|---|---|
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| D310512 | Tajima | Sep 1990 | |
| D310513 | Tajima | Sep 1990 | |
| D314943 | Tajima | Feb 1991 | |
| 4913664 | Dixon et al. | Apr 1990 | |
| 4983127 | kawai et al. | Jan 1991 | |
| 5007862 | Defibaugh et al. | Apr 1991 | |
| 5037330 | Fulponi et al. | Aug 1991 | |
| 5192228 | Collins et al. | Mar 1993 | |
| 5281169 | Kiat et al. | Jan 1994 | |
| 5288248 | Chen | Feb 1994 | |
| 5622523 | Kan et al. | Apr 1997 |