"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 |
| 4094618 | Rotary piston engines Rotor housing for rotary piston engines having a base and a chromium-plated inner wall. The base is made of an iron-based material having a hardness of not less than 105 in Vickers' scale and the chromium-plated layer has a hardness not less than 850 in V... | 06/13/1978 |
| 4087116 | Drive axle suspension system in motor vehicle A drive axle suspension system includes a rigid drive axle and a housing therefor, an upper pair of links pivotally coupled at their front ends to the vehicle body and at their rear ends to opposed end portions of the housing, and a lower pair of links pi... | 05/02/1978 |
| 4087099 | Oil seal means for rotary piston engines In a rotary piston engine comprising a casing having a pair of opposed inner side surfaces, and a rotor disposed in the casing and having opposite side surfaces confronting with said inner side surfaces of the casing, an oil seal assembly is positioned in... | 05/02/1978 |
| 4084549 | Rotary piston engine exhaust gas recycling means Exhaust gas recycling means by which exhaust gas is recycled and introduced, via a port which is formed in the peripheral wall of a rotary piston engine and which port may also serve for introduction of air or an air-fuel mixture required for low-speed op... | 04/18/1978 |