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Antenna duplexer
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Patent number 6,085,071
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Issue date Jul 4, 2000
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Matsushita Electric Industrial Co., Ltd.
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Toru Yamada
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H01 - BASIC ELECTRIC ELEMENTS
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Filter apparatus
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Patent number 4,772,862
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Issue date Sep 20, 1988
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Matsushita Electric Industrial Co., Ltd.
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Kazuhiko Kubo
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H03 - BASIC ELECTRONIC CIRCUITRY
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Coaxial resonator
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Patent number 4,434,410
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Issue date Feb 28, 1984
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Matsushita Electric Industrial Co., Ltd.
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Hideyuki Miyake
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H01 - BASIC ELECTRIC ELEMENTS