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Inside corner form
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Patent number 5,230,907
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Issue date Jul 27, 1993
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Strickland Industries, Inc.
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James Strickland
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B28 - WORKING CEMENT, CLAY, OR STONE
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Form set-up
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Patent number 4,679,762
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Issue date Jul 14, 1987
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Yuan-Ho Lee
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E04 - BUILDING
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3894711
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Patent number 3,894,711
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Issue date Jul 15, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3841596
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Patent number 3,841,596
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Issue date Oct 15, 1974
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E04 - BUILDING
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3818084
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Patent number 3,818,084
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Issue date Jun 18, 1974
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E04 - BUILDING
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3676975
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Patent number 3,676,975
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Issue date Jul 18, 1972
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E04 - BUILDING
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3614050
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Patent number 3,614,050
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Issue date Oct 19, 1971
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E04 - BUILDING
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3574905
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Patent number 3,574,905
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Issue date Apr 13, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3390858
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Patent number 3,390,858
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Issue date Jul 2, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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3206156
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Patent number 3,206,156
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Issue date Sep 14, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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2598830
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Patent number 2,598,830
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Issue date Jun 3, 1952
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E04 - BUILDING
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2595123
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Patent number 2,595,123
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Issue date Apr 29, 1952
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E04 - BUILDING