Number | Name | Date | Kind |
---|---|---|---|
3898396 | Gushue et al. | Aug 1975 | |
4054756 | Comella et al. | Oct 1977 | |
4327251 | Fomenko et al. | Apr 1982 | |
4359607 | Hannig et al. | Nov 1982 | |
4389546 | Glisson et al. | Jun 1983 | |
4431086 | Moser et al. | Feb 1984 | |
4489438 | Hughes | Dec 1984 |
Number | Date | Country |
---|---|---|
0028466 | Feb 1982 | JPX |
Entry |
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"Desktop System Talks on Phone", Electronics, Jan. 27, 1983, p. 141. |