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| Number | Title | Issue Date |
| 6935082 | Storm impact protection system A impact protection system for building openings, such as windows and doors, includes a shutter assembly having angled blades extending between frame members in such as manner that access areas are provided when the shutters are closed to permit insertion of a storm... | 08/30/2005 |
| 5140913 | Railway car body structures A railway car body structure has a panel assembly forming at least part of a side, the roof, an end or the floorplate. Each panel has inner and outer spaced metal sheets and a cellular metal core bonded to the sheets and maintaining them spaced apart. To ... | 08/25/1992 |
| 5016395 | Boxcar door having balsa core sandwich construction A door for railroad boxcars has a balsa core sandwich construction in which a balsa core is sandwiched between thin fiberglass skins and reinforced at the perimeter by steel tubes to provide an economical and lightweight door that exhibits the requisite s... | 05/21/1991 |
| 4751793 | Freight car door construction A rail car sliding door includes a substantially rectangular frame having a pair of side frame members and top and bottom frame members which are secured to each other. At least one corrugated panel is secured to the frame. Top, bottom and side reinforcin... | 06/21/1988 |
| 4494354 | Door frame construction A door frame is fabricated of rolled sheet metal vertical frame pieces each including a first channel for receiving the end portions of wood or metal horizontal crosspieces and a second channel for receiving the end portions of corrugated or other panel m... | 01/22/1985 |
| 4353187 | Door repair method and repair section therefor A corrugated metal door having a damaged lower section is repaired by removing the entire lower damaged section, including the door bottom frame member and portions of the door side frame members, and replacing same with prefabricated door repair section.... | 10/12/1982 |
| 4271649 | Structural panel A structural panel such as a door for a railway freight car has a lightweight core formed by two sheets of low density material e.g. balsa wood. Each sheet has bonded to one side a series of layers of glass fibre, and the sheets are bonded together in con... | 06/09/1981 |
| 4232612 | Wall lining with attachment means A wall lining sheet, particularly, but not exclusively, for lining the interior end walls of freight railway cars. The wall lining sheet comprises a metal sheet having a plurality of spaced-apart attachment tabs each defined by a configured slot extending... | 11/11/1980 |
