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Pendulum
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Patent number 4,834,224
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Issue date May 30, 1989
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Eduard Haider
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Antenna mast
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Patent number 4,146,897
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Issue date Mar 27, 1979
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Her Majesty the Queen in right of Canada, as represented by the Minister of N...
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John A. F. Wilson
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H01 - BASIC ELECTRIC ELEMENTS
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3826339
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Patent number 3,826,339
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Issue date Jul 30, 1974
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3826340
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Patent number 3,826,340
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Issue date Jul 30, 1974
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3210765
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Patent number 3,210,765
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Issue date Oct 5, 1965
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H01 - BASIC ELECTRIC ELEMENTS
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2947989
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Patent number 2,947,989
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Issue date Aug 2, 1960
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H01 - BASIC ELECTRIC ELEMENTS
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2510059
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Patent number 2,510,059
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Issue date Jun 6, 1950
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E04 - BUILDING