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Structural member of pipe shape
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Patent number 5,348,777
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Issue date Sep 20, 1994
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Sumitomo Rubber Industries, Ltd.
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Masahide Oonuki
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Structural member of pipe shape
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Patent number 5,242,721
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Issue date Sep 7, 1993
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Sumitomo Rubber Industries, Ltd.
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Masahide Oonuki
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL