Number | Name | Date | Kind |
---|---|---|---|
4784408 | Yasuda | Nov 1988 | |
4824496 | Seifert et al. | Apr 1989 | |
4973088 | Levy | Nov 1990 |
Number | Date | Country |
---|---|---|
3521542 | Dec 1986 | DEX |
58-59062 | Apr 1983 | JPX |
Entry |
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Compuserve Magazine, Mar. 1993, "Making the Best of a Sticky Situation", p. 6. |