Number | Name | Date | Kind |
---|---|---|---|
4879743 | Burke et al. | Nov 1989 | |
4918322 | Winter et al. | Apr 1990 | |
4935954 | Thompson et al. | Jun 1990 | |
4942598 | Davis | Jul 1990 | |
4975896 | D'Agosto et al. | Dec 1990 | |
4996704 | Brunson | Feb 1991 | |
4996707 | O'Malley et al. | Feb 1991 | |
4998248 | Matsuzaki | Mar 1991 | |
5018191 | Catron et al. | May 1991 | |
5095505 | Finucasse et al. | Mar 1992 | |
5109405 | Morganstein | Apr 1992 |
Number | Date | Country |
---|---|---|
0248057 | Dec 1985 | JPX |
Entry |
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"Beyond ISDN Theory", Andrew Waite, Inbound/Outbound Magazine, Dec. 1989, pp. 20-22, 24 and 27. |
The New York Times; "Opening Nation's Phone Networks", E. L. Andrews; Jan. 16, 1991; p. D5. |