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Method of reinforcing a ceiling runner
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Patent number 4,554,718
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Issue date Nov 26, 1985
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Armstrong World Industries, Inc.
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James C. Ollinger
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Reinforced ceiling runner
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Patent number 4,489,529
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Issue date Dec 25, 1984
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Armstrong World Industries, Inc.
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James C. Ollinger
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E04 - BUILDING
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Suspended ceiling runner
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Patent number 4,070,125
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Issue date Jan 24, 1978
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Armstrong Cork Company
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James C. Ollinger
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E04 - BUILDING
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