| Number | Name | Date | Kind |
|---|---|---|---|
| 4837798 | Cohen et al. | Jun 1989 | |
| 4918722 | Duehren et al. | Apr 1990 | |
| 5008926 | Misholi | Apr 1991 | |
| 5033804 | Faris | Jul 1991 | |
| 5068888 | Scherk et al. | Nov 1991 | |
| 5127003 | Doll, Jr. et al. | Jun 1992 | |
| 5129016 | Murakami et al. | Jul 1992 | |
| 5193110 | Jones et al. | Mar 1993 | |
| 5196943 | Hersee et al. | Mar 1993 | |
| 5237430 | Sakurai | Aug 1993 | |
| 5239466 | Morgan et al. | Aug 1993 | |
| 5291302 | Gordon et al. | Mar 1994 | |
| 5311573 | Otsuki | May 1994 | |
| 5333266 | Boaz et al. | Jul 1994 | |
| 5339169 | Meguro et al. | Aug 1994 |
| Number | Date | Country |
|---|---|---|
| 61-60060 | Mar 1986 | JPX |
| 1311753 | Dec 1989 | JPX |
| 2211698 | Jul 1989 | GBX |
| Entry |
|---|
| FaxMemo Product Literature, Centigram Communications Corporation, Apr. 1991. |
| Integrated Voice/Fax Mail Product Literature, Digital Sound Corporation, 1992. |
| Fax Management, AudioFax Classes of Service, Series 100 and 300 Application Note, AudioFAX, Inc., 1992. |
| "Brooktrout unveils 4-port voice/facsimile/data card", Network World, Jul. 27, 1992. |
| "The Universal Port", product brochure, Brooktrout Technology, circa Jun. 1992. |
| "A New Twist in Fax", Teleconnect, Jan. 1988, p. 39. |