Number | Date | Country | Kind |
---|---|---|---|
3707500 | Mar 1987 | DEX | |
3711030 | Apr 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4631534 | Franklin et al. | Dec 1986 | |
4654890 | Hasegawa et al. | Mar 1987 | |
4740955 | Litterer et al. | Apr 1988 |
Entry |
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AMD Product Specifications; "AM 7901 Subscriber Line Audio-Processing Circuit"; Apr. 1983. |