Number | Name | Date | Kind |
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4539706 | Mears et al. | Sep 1985 | |
4727590 | Kawaro et al. | Feb 1988 | |
4759051 | Han | Jul 1988 |
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Seki et al., "Detachable Unit Service in 800 MHz Band Cellular Radiotelephone System", IEEE Communications, 2/86, vol. 24, No. 2, pp. 47-52. |