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Ball screw apparatus
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Patent number 5,327,795
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Issue date Jul 12, 1994
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NSK Ltd.
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Masayuki Katahira
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Pneumatic linear actuator
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Patent number 4,106,390
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Issue date Aug 15, 1978
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Kuroda Seiko Co., Ltd.
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Hiroshi Kodaira
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G05 - CONTROLLING REGULATING
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3420347
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Patent number 3,420,347
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Issue date Jan 7, 1969
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G05 - CONTROLLING REGULATING
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3362601
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Patent number 3,362,601
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Issue date Jan 9, 1968
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3190139
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Patent number 3,190,139
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Issue date Jun 22, 1965
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G05 - CONTROLLING REGULATING