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"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 |
| 6997121 | Minimum tillage agricultural implement having furrow opening shank assemblies An agricultural implement for forming a furrow in a soil, is described and which includes a rotatable shank; a resilient, movement limiting member disposed in force transmitting relation relative to the rotatable shank; and a pair of wheels mounted for earth engagin... | 02/14/2006 |
| 6688243 | Minimum tillage agricultural implement having furrow opening shank assemblies A minimum tillage agricultural implement 10 having a plurality of laterally spaced shank assemblies 60, 62 mounted on a transverse tool bar 56, 58. Each shank assembly 60, 62 has an elongated narrow upright shank 70 that extends downward from the tool bar... | 02/10/2004 |
