"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7002448 | Control drive with adjustable potentionmeter A control drive according to the related art does not have a potentiometer that allows a position of the motor or the driven wheel to be registered. The control drive (1) according to the invention allows a position of the motor or the driven wheel to ... | 02/21/2006 |
| 5600176 | Integrated voltage divider Integrated voltage divider comprising partial resistors (R1 ,R2) formed of paths of polycrystalline semiconductor material applied over a dielectric layer (4) on a semiconductor substrate (5). Under the paths, each forming a partial resistor (R1,R2) in th... | 02/04/1997 |