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Spring enclosed trampoline
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Patent number 10,188,888
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Issue date Jan 29, 2019
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Samuel Chen
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Leaf spring stabiliser
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Patent number 6,062,549
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Issue date May 16, 2000
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Antonette I Lamberti
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B60 - VEHICLES IN GENERAL
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Pivotal bearing for an omega spring
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Patent number 4,032,128
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Issue date Jun 28, 1977
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Danfoss A/S
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Holger Nicolaisen
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3921965
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Patent number 3,921,965
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Issue date Nov 25, 1975
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B60 - VEHICLES IN GENERAL
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3322475
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Patent number 3,322,475
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Issue date May 30, 1967
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1934767
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Patent number 1,934,767
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Issue date Nov 14, 1933
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1772730
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Patent number 1,772,730
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Issue date Aug 12, 1930
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B60 - VEHICLES IN GENERAL