| Number | Name | Date | Kind |
|---|---|---|---|
| 4089045 | Mars | May 1978 | |
| 4330776 | Dennison et al. | May 1982 | |
| 4415983 | Lachmann et al. | Nov 1983 | |
| 4730186 | Koga et al. | Mar 1988 | |
| 4884068 | Matheny et al. | Nov 1989 | |
| 4885482 | Sharp et al. | Dec 1989 | |
| 4899137 | Behrens et al. | Feb 1990 | |
| 4916441 | Gombrich | Apr 1990 | |
| 4926010 | Citron | May 1990 | |
| 5018076 | Johary et al. | May 1991 | |
| 5048210 | Taylor et al. | Sep 1991 | |
| 5103376 | Blonder | Apr 1992 | |
| 5115374 | Hongoh | May 1992 |
| Number | Date | Country |
|---|---|---|
| 235320 | Sep 1987 | EPX |
| 356757 | Mar 1990 | EPX |
| 3808364 | Sep 1989 | DEX |
| Entry |
|---|
| IBM Technical Disclosure Bulletin, vol. 30 No. 4, Sep. 1987, pp. 1674-1676 "Device Driver For a Touchpad or Touch Screen Computer Input Device". |