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Adjustable split door jamb
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Patent number 4,019,303
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Issue date Apr 26, 1977
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Combustion Engineering, Inc.
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Owen Earl McAllister
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Adjustable split door jamb
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Patent number 3,981,103
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Issue date Sep 21, 1976
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Combustion Engineering, Inc.
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Owen Earl McAllister
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Adjustable framing member
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Patent number 3,962,828
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Issue date Jun 15, 1976
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Combustion Engineering, Inc.
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Owen Earl McAllister
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS