Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7434768 | Portable turnout system A portable turnout system for temporary connection of a rail line to a spur line includes a ramp section having a frame and two parallel rails mounted thereon, the parallel rails each having a forward end and a rearward end higher than the forward end such that the ... | 10/14/2008 |
| 4224875 | Static switching apparatus for passenger vehicle A static switching apparatus for a track vehicle includes a main line track and a switch track which at a switching junction both include a conventional track rail and a specially constructed rail. A switching cam including cam faces is positioned at the ... | 09/30/1980 |
| 4068598 | Element of vehicle running on railway tracks The invention relates to an element of a vehicle which is part of a continuously moving train of similar vehicles, the element consisting, on the one hand, of two axles carrying wheels with solid tires and inner tubes and, on the other, of an on-board shu... | 01/17/1978 |
| 4015805 | Railway switch or railway crossing Railway switch for transferring railway vehicles from a main track to a siding and, respectively, crossing of a siding with a main track, the switch or crossing comprising a frog in which the rail of the main track is uninterrupted, noting that the portio... | 04/05/1977 |
| 4005839 | Railroad turnouts A railroad turnout including a switch having runoff plates with stop lugs spaced farther apart than the width of the switch point base so that flexure of the switch points downstream of the heel spread is permitted. Floating heel blocks are affixed to the... | 02/01/1977 |
