Number | Name | Date | Kind |
---|---|---|---|
4163878 | Hashemi | Aug 1979 | |
4174470 | Seidel | Nov 1979 | |
4670870 | Hewinson et al. | Jun 1987 | |
4856058 | Sato et al. | Aug 1989 | |
4989243 | Choi | Jan 1991 | |
5127046 | Malm | Jun 1992 | |
5253249 | Fitzgerald | Oct 1993 | |
5402485 | Takato et al. | Mar 1995 | |
5479504 | Nakano et al. | Dec 1995 | |
5524047 | Brown et al. | Jun 1996 |
Number | Date | Country |
---|---|---|
3322642 A 1 | Jan 1985 | DEX |
Entry |
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IBM Technical Disclosure Bulletin, "Telecommunications Transmitter/Receiver with Sidetone Suppression," vol. 25, No. 4, Sep. 1982. |