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Ceiling panel assembly
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Patent number 4,858,409
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Issue date Aug 22, 1989
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Industral Acoustics Company, Inc.
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John M. Handley
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E04 - BUILDING
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Self-locking devices
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Patent number 4,061,371
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Issue date Dec 6, 1977
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Edson Tool and Manufacturing Company, Inc.
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Joseph E. Prather
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Self-locking devices
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Patent number 4,058,334
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Issue date Nov 15, 1977
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Edson Tool and Manufacturing Company, Inc.
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Joseph E. Prather
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Self-locking devices
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Patent number 4,029,348
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Issue date Jun 14, 1977
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Edson Tool and Manufacturing Company, Inc.
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Joseph E. Prather
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES