| Number | Name | Date | Kind |
|---|---|---|---|
| 4712191 | Penna | Dec 1987 | |
| 4829453 | Katsuta et al. | May 1989 | |
| 5040131 | Torres | Aug 1991 | |
| 5148154 | Mackay et al. | Sep 1992 | |
| 5237653 | Noguchi et al. | Aug 1993 |
| Number | Date | Country |
|---|---|---|
| 0287858 | Mar 1988 | EPX |
| 4070926 | Apr 1990 | JPX |
| 2005092 | Sep 1990 | JPX |
| Entry |
|---|
| A Visual Shell Interface To A Database, Lawrence A. Rowe, Peter Danzig and Wilson Choi, Computer Sicence Division, EECS Department, University of California, 1989 by John Wiley & Sons, Ltd. pp. 515-528. |