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Channel changing system
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Patent number 4,975,939
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Issue date Dec 4, 1990
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Fujitsu Limited
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Susumu Sasaki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Radio communication system
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Patent number 4,665,532
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Issue date May 12, 1987
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Fujitsu Limited
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Eisuke Fukuda
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Digital radio relay system
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Patent number 4,607,376
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Issue date Aug 19, 1986
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Fujitsu Limited
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Susumu Sasaki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Radio communication system
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Patent number 4,606,048
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Issue date Aug 12, 1986
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Fujitsu Limited
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Susumu Sasaki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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