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Brushless linear servomotor
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Patent number 4,509,001
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Issue date Apr 2, 1985
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Matsushita Electric Industrial Co., Ltd.
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Noriaki Wakabayashi
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G05 - CONTROLLING REGULATING
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3543167
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Patent number 3,543,167
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Issue date Nov 24, 1970
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G05 - CONTROLLING REGULATING
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3523231
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Patent number 3,523,231
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Issue date Aug 4, 1970
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G05 - CONTROLLING REGULATING
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2867724
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Patent number 2,867,724
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Issue date Jan 6, 1959
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G05 - CONTROLLING REGULATING