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Concrete molding device
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Patent number 5,198,246
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Issue date Mar 30, 1993
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Monoform, Inc.
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Kenneth T. Bowen
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Vibrator
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Patent number 4,172,986
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Issue date Oct 30, 1979
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Okura Electric Industry Company, Ltd.
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Tsuneo Iwaide
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
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3866480
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Patent number 3,866,480
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Issue date Feb 18, 1975
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
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3813068
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Patent number 3,813,068
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Issue date May 28, 1974
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B28 - WORKING CEMENT, CLAY, OR STONE
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3804375
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Patent number 3,804,375
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Issue date Apr 16, 1974
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E04 - BUILDING
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2470671
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Patent number 2,470,671
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Issue date May 17, 1949
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B28 - WORKING CEMENT, CLAY, OR STONE
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2213159
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Patent number 2,213,159
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Issue date Aug 27, 1940
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E04 - BUILDING
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2094281
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Patent number 2,094,281
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Issue date Sep 28, 1937
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1787449
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Patent number 1,787,449
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Issue date Jan 6, 1931
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B28 - WORKING CEMENT, CLAY, OR STONE
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1751087
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Patent number 1,751,087
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Issue date Mar 18, 1930
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E04 - BUILDING