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ISDN interface unit
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Patent number 5,638,373
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Issue date Jun 10, 1997
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Fujitsu Limited
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Tomoyoshi Takebayashi
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Teleconference terminal
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Patent number 5,512,938
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Issue date Apr 30, 1996
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Matsushita Electric Industrial Co., Ltd.
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Kenzo Ohno
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G06 - COMPUTING CALCULATING COUNTING
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ISDN interface unit
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Patent number 5,450,412
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Issue date Sep 12, 1995
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Fujitsu Limited
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Tomoyoshi Takebayashi
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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