| Number | Name | Date | Kind |
|---|---|---|---|
| 4076961 | Holsinger et al. | Feb 1978 | |
| 4672459 | Kudo | Jun 1987 | |
| 4741037 | Goldstern | Apr 1988 | |
| 4850008 | Berg et al. | Jul 1989 | |
| 5274697 | Schroeder et al. | Dec 1993 |
| Number | Date | Country |
|---|---|---|
| 3-68228 | Mar 1991 | JPX |
| Entry |
|---|
| Bowen, Ted Smalley; "Fault-Tolerant Net Hardware Cuts System Downtime;" in Digital Review, Jan. 29, 1990 v 7 No. 4 p. 10. |