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|---|---|---|---|
| D297243 | Wells-Papanek et al. | Aug 1988 | S |
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| 5163130 | Hullot | Nov 1992 | A |
| 5287514 | Gram | Feb 1994 | A |
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| 5469540 | Powers, III et al. | Nov 1995 | A |
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| 5600778 | Swanson et al. | Feb 1997 | A |
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| D388776 | Zhang et al. | Jan 1998 | S |
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| Entry |
|---|
| “Building User Interfaces by Direct Manipulation,” Proceedings of the ACM SIGGRAPH Symposium on User Interface Software, ACM Press, 1988, pp. 152-166. |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29/038514 | May 1995 | US |
| Child | 29/087784 | US |