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Pipe forming roll apparatus and method
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Patent number 6,216,940
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Issue date Apr 17, 2001
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Kawasaki Steel Corporation
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Koji Sugano
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Pipe forming roll apparatus and method
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Patent number 6,041,632
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Issue date Mar 28, 2000
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Kawasaki Steel Corporation
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Koji Sugano
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Apparatus for manufacturing a welded pipe
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Patent number 5,784,911
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Issue date Jul 28, 1998
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Kusakabe Electric & Machinery Co., Ltd.
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Yuji Hashimoto
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Sprocket chain
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Patent number 4,315,750
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Issue date Feb 16, 1982
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Honda Giken Kogyo Kabushiki Kaisha
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Yoshinori Kawashima
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...