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Halogen-free floor covering
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Patent number 5,276,082
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Issue date Jan 4, 1994
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Armstrong World Industries, Inc.
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John S. Forry
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Charge dissipative surface coverings
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Patent number 5,091,452
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Issue date Feb 25, 1992
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Armstrong World Industries, Inc.
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Kenneth K. Ko
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Charge dissipative floor tiles
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Patent number 4,944,998
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Issue date Jul 31, 1990
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Armstrong World Industries, Inc.
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Kenneth K. Ko
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Charge dissipative floor tiles
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Patent number 4,826,912
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Issue date May 2, 1989
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Armstrong World Industries, Inc.
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Kenneth K. Ko
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...