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Optical transmission unit
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Patent number 5,825,518
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Issue date Oct 20, 1998
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Matsushita Electric Industrial Co., Ltd.
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Kazuki Maeda
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical transmission system
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Patent number 5,351,148
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Issue date Sep 27, 1994
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Matsushita Electric Industrial Co., Ltd.
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Kazuki Maeda
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical transmission apparatus
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Patent number 4,611,352
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Issue date Sep 9, 1986
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Matsushita Electric Industrial Co., Ltd.
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Katsuyuki Fujito
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H04 - ELECTRIC COMMUNICATION TECHNIQUE