| Number | Name | Date | Kind |
|---|---|---|---|
| D255031 | Lazzara | May 1980 | |
| D263822 | Smith | Apr 1982 | |
| D265986 | Wearsch et al. | Aug 1982 | |
| D274721 | Smith | Jul 1984 | |
| 4451693 | Vest | May 1984 |
| Entry |
|---|
| Advertisement of Lippincott Industries Inc. in "Telephony", Jun. 27, 1983, pp. 14-15. |
| Advertisement of Western Electric for "The 1A Network Termination Unit". |
| Brochure of Keptel Inc. for "Network Interface". |