Number | Name | Date | Kind |
---|---|---|---|
3644873 | Dalton et al. | Feb 1972 | |
3665285 | Mullersman et al. | May 1972 | |
3924097 | Knowles et al. | Dec 1975 | |
4419616 | Baskins et al. | Dec 1983 | |
4963812 | Mischenko et al. | Oct 1990 | |
5052943 | Davis | Oct 1991 | |
5229701 | Leman et al. | Jul 1993 |
Entry |
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Owner's Manual-Motorola Digital Personal Communicator Telephone, 1991 pp. 53-55. |