| Number | Name | Date | Kind |
|---|---|---|---|
| 4766604 | Axberg | Aug 1988 | |
| 4825460 | Carter et al. | Apr 1989 | |
| 4972461 | Brown et al. | Nov 1990 | |
| 5003584 | Benyacar et al. | Mar 1991 | |
| 5023868 | Davidson et al. | Jun 1991 | |
| 5099509 | Morganstein et al. | Mar 1992 | |
| 5134646 | Carlson | Jul 1992 | |
| 5311574 | Livanos | May 1994 | |
| 5333186 | Gupta | Jul 1994 | |
| 5455852 | Elrod et al. | Oct 1995 | |
| 5483582 | Pugh et al. | Jan 1996 | |
| 5504805 | Lee | Apr 1996 |
| Number | Date | Country |
|---|---|---|
| 157257 | Sep 1983 | JPX |
| Entry |
|---|
| Digital Sound Corporation "Voiceserver Automated Attendant" Advertisement, Nov., 1988. |