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Gas spring
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Patent number 4,219,190
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Issue date Aug 26, 1980
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Tokico Ltd.
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Toshiro Nagase
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Door closer
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Patent number 4,180,888
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Issue date Jan 1, 1980
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Tokico Ltd.
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Toshiro Nagase
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Spring device
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Patent number 4,139,182
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Issue date Feb 13, 1979
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Tokico Ltd.
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Toshiro Nagase
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Door closer
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Patent number 4,102,004
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Issue date Jul 25, 1978
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Tokico Ltd.
-
Toshiro Nagase
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES