Number | Name | Date | Kind |
---|---|---|---|
3857382 | Williams, Jr. et al. | Dec 1974 | A |
4231287 | Smiley | Nov 1980 | A |
4938742 | Smits | Jul 1990 | A |
5096388 | Weinberg | Mar 1992 | A |
5611676 | Ooumi et al. | Mar 1997 | A |
Entry |
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http://www.acx.com/press_release_5.html, Dec. 1996. |