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Demountable wall panel
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Patent number 4,628,656
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Issue date Dec 16, 1986
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Donn Incorporated
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Robert J. Menchetti
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E04 - BUILDING
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Window system for demountable walls
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Patent number 4,574,547
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Issue date Mar 11, 1986
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Donn, Incorporated
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Robert J. Menchetti
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Window insulating system
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Patent number 4,514,945
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Issue date May 7, 1985
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Donn Incorporated
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Robert J. Menchetti
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS