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 |
| 4274336 | Monorail guideway assembly A strong, lightweight monorail guideway assembly for carrying a monorail train vehicle in transport having selectively joined load-bearing rails which are structurally reinforceable on site in relation to support columns holding the track in suspension. V... | 06/23/1981 |
| 4094252 | Self-controlled on-grade monorail track switch and method A monorail track switch and method is disclosed wherein the track switch senses the approach of a train and automatically aligns itself to accommodate passage of the train. Circuits are provided to selectively deenergize a movable track section when in no... | 06/13/1978 |
