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Battery charge indicator
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Patent number 6,242,891
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Issue date Jun 5, 2001
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Batteryguard Limited
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Peter Cecil Joseph Parsonage
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G01 - MEASURING TESTING
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Battery monitor
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Patent number 6,037,749
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Issue date Mar 14, 2000
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Batteryguard Limited
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Peter Cecil Joseph Parsonage
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B60 - VEHICLES IN GENERAL
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Speed indicating means
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Patent number 4,653,319
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Issue date Mar 31, 1987
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Development Finance Corporation of New Zealand
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Peter C. J. Parsonage
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G01 - MEASURING TESTING
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Electronic switch
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Patent number 4,651,023
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Issue date Mar 17, 1987
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Development Finance Corporation
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Peter C. J. Parsonage
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G08 - SIGNALLING