|
| US4073452 | 30 Jul 1976 | 14 Feb 1978 | Messerschmitt-Bolkow-Blohm Gesellschaft mit beschrankter Haftung | Apparatus for delaying the pressure drop in pressurized cabins or the like especially in an emergency |
| US4247237 | 5 Jun 1979 | 27 Ene 1981 | Down River International, Inc. | Free standing honeycomb load spacer |
| US4247583 | 30 Oct 1978 | 27 Ene 1981 | | Insulating structure with polygonal cells |
| US4686893 | 23 Jun 1986 | 18 Ago 1987 | | Cover assembly for an air moving device |
| US4865889 | 10 May 1988 | 12 Sep 1989 | Down River International Inc. | Void filler and method for manufacture |
| US5062751 | 13 Mar 1991 | 5 Nov 1991 | Shippers Paper Products Company | Economy void filler |