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Floor grid system
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Patent number 4,999,964
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Issue date Mar 19, 1991
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Innovative Building Products, Inc.
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John R. Taylor
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E04 - BUILDING
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Screw slot runner system
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Patent number 4,535,580
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Issue date Aug 20, 1985
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Donn Incorporated
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Richard Shirey
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E04 - BUILDING
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Lattice construction
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Patent number 4,007,899
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Issue date Feb 15, 1977
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Reactor Centrum Nederland
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Gijsbrecht Gerhardus Piepers
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E04 - BUILDING
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3889438
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Patent number 3,889,438
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Issue date Jun 17, 1975
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E04 - BUILDING
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3604176
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Patent number 3,604,176
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Issue date Sep 14, 1971
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E04 - BUILDING
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3378979
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Patent number 3,378,979
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Issue date Apr 23, 1968
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3076481
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Patent number 3,076,481
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Issue date Feb 5, 1963
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E04 - BUILDING
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2640570
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Patent number 2,640,570
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Issue date Jun 2, 1953
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E04 - BUILDING
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2302586
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Patent number 2,302,586
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Issue date Nov 17, 1942
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E04 - BUILDING
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2290746
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Patent number 2,290,746
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Issue date Jul 21, 1942
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E04 - BUILDING
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2289469
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Patent number 2,289,469
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Issue date Jul 14, 1942
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E04 - BUILDING
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1698429
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Patent number 1,698,429
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Issue date Jan 8, 1929
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E04 - BUILDING
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1575772
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Patent number 1,575,772
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Issue date Mar 9, 1926
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E04 - BUILDING