Number | Name | Date | Kind |
---|---|---|---|
4064440 | Roder | Dec 1977 | |
4366382 | Kotowski | Dec 1982 | |
4511799 | Bjorkholm | Apr 1985 | |
5098640 | Gozani et al. | Mar 1992 | |
5319547 | Krug et al. | Jun 1994 | |
5369572 | Harahi et al. | Nov 1994 |
Entry |
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Winston, "Artificial Intelligence," 1984, pp. 43-45. |