Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7191711 | Shafting especially a cardan shaft and homokinetic bogie drive system for rail vehicles A shafting, particularly a cardan shaft for rail vehicles, has two cardan joints (4,5), each of which comprises two link forks (7–10) coupled to one another by a central part (6). The central part (6) comprises at least two partial elem... | 03/20/2007 |
| 4790248 | Dual gimbal coupling A dual coupling (1) comprises two elastic and articulated couplings (2 and 2a) interconnected by a hollow, intermediate shaft (3). Each one of the couplings (2,2a) contain an outer half (4,4a) with a hub (5,5a) from which extend several arms (6). Between ... | 12/13/1988 |
| 3955808 | Prestressed composite spring element A spring element comprises an insert formed of a rigid metallic core having four outwardly directed faces each bonded to a respective side of a respective elastomeric body whose other side is bonded to a respective metallic plate. The insert so formed is ... | 05/11/1976 |
