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| Patents for E04F 11 - Stairways, ramps, or like structures; Balustrades; Handrails (7,719) |
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| 10/12/1976 | US3985202 Hydraulically operated disappearing stairway | | 09/28/1976 | US3983205 Method of molding reinforced articles | | 09/28/1976 | US3982735 Dismantable and directable rail or balustrade | | 09/21/1976 | US3981112 Prefabricated stair construction | | 09/07/1976 | US3978628 Constructional units for stepped structures | | 08/17/1976 | US3975000 Prefabricated balustrade with means for connection of balusters to a rail | | 08/17/1976 | US3974894 Portable riser | | 08/10/1976 | US3973756 Railing and method of assembly | | 06/22/1976 | US3964222 Wooden spiral staircase | | 06/22/1976 | US3964215 Folding handrails for telescoping seating sections | | 06/15/1976 | US3962838 Shelf-adjusting stair | | 06/15/1976 | US3962774 Method of interlocking a lateral member and the end of a hollow post | | 05/11/1976 | US3955800 Railing structure | | 05/11/1976 | US3955799 Protective railing device | | 04/13/1976 | US3949858 Handrail for passenger conveyors and the like | | 04/06/1976 | US3947916 Trowel for masonry steps | | 03/09/1976 | US3942763 Adjustable wrought iron railing assembly | | 01/20/1976 | US3932972 Stair construction | | 01/06/1976 | US3930638 Hand rail |
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