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Forming roller for corrugated fin
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Patent number 5,509,288
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Issue date Apr 23, 1996
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Nippondenso Co., Ltd.
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Tetuo Ohno
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Method of making a corrugated fin
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Patent number 5,295,303
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Issue date Mar 22, 1994
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Nippondenso Co., Ltd.
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Yuji Ogawa
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Metal plate laminated body
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Patent number 4,900,636
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Issue date Feb 13, 1990
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Nippondenso Co., Ltd.
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Syoishi Takenouchi
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER