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Battery pack
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Patent number 6,440,601
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Issue date Aug 27, 2002
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Matsushita Electric Industrial Co., Ltd.
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Takayuki Aoi
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H01 - BASIC ELECTRIC ELEMENTS
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Battery and battery holder
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Patent number 6,391,490
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Issue date May 21, 2002
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Matsushita Electric Industrial Co. Ltd.
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Takayuki Aoi
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H01 - BASIC ELECTRIC ELEMENTS
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Battery
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Patent number 5,976,728
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Issue date Nov 2, 1999
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Matsushita Electric Industrial Co., Ltd.
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Kenji Yamamoto
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H01 - BASIC ELECTRIC ELEMENTS