Number | Date | Country | Kind |
---|---|---|---|
6-226181 | Sep 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
5414847 | Tsukakoshi | May 1995 | |
5553278 | Suzuki et al. | Sep 1996 | |
5566330 | Sheffield | Oct 1996 |
Entry |
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"Fundamentals of Database Systems", Elmasro & Navathe, 2nd Ed., pp. 26-31, Addison-Wesley Publishing Company, Mar. 1994. |