Number | Name | Date | Kind |
---|---|---|---|
2743176 | Thomas et al. | Apr 1956 | |
4702887 | Larson | Oct 1987 | |
5242657 | Sahu | Sep 1993 | |
5938864 | Tommikawa et al. | Aug 1999 | |
5942056 | Singh | Aug 1999 |
Entry |
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English language abstract of Japnese Patent Document JP409316570A, Dec. 1997. |