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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 |
| 7377551 | Collapsible snowboard pole A collapsible snowboard pole is presented. In exemplary embodiments of the present invention a snowboard pole can be provided with a manually expandable and compressible shaft, a basket at the tip, and a handle at the top. The basket can slide between a lower tip-wa... | 05/27/2008 |
| 7252104 | Walking cane with integral item retrieval means A walking cane having an integral item retrieval means includes an elongated hollow shaft having a J-shaped handle member at an upper end. A lever is slidably positioned immediately beneath the handle member that is operably connected to a pivotal claw on the lower ... | 08/07/2007 |
| 6711772 | Survival tool The present invention discloses a survival tool that can be used as a spear, a crutch, a walking stick, or in pairs as a stretcher. The present invention discloses an elongated rod like device being segmented with each segment having a specific purpose or use. Segme... | 03/30/2004 |
| 6488042 | Walking cane having a multifunctional, expandable handle A walking cane having a multifunctional handle, where the handle, which outwardly appears to be a conventional handle, is comprised of articulating elements which can be rotated outwardly, therein transforming the handle into a tripod like structure. The ... | 12/03/2002 |
| 6330888 | Visual stimulation cane for Parkinson's Disease sufferers A visual stimulation cane or walking stick assists a Parkinson's Disease patient in overcoming a sudden immobility or freezing episode. The cane carries a visual indicator, which can be a plastic strip or leg, and which can be extended when needed to prov... | 12/18/2001 |
| 5711335 | Medical walker foot with collapsible tip A medical walker foot includes a shell having a base portion for engaging a floor or the ground when weight is applied to the walker and a sleeve portion for receiving the lower end of the medical walker leg. A cup-like urethane cushion is disposed within... | 01/27/1998 |
| 4977914 | Slip resistent apparatus for canes, crutches and walkers A slip resistent apparatus for walking aids such as canes, crutches and walkers is disclosed. The apparatus provides a spring biased, lever actuated, selectively operable, ground engaging probe slidingly displaced within the vertical structure of the walk... | 12/18/1990 |
| 4434808 | Anti-skid device for a cane, crutch, or the like An anti-skid device according to the teachings of the present invention is shown utilized with a cane, crutch, or the like and includes a gripping member having a plurality, preferably three, non-skid pins which are vertically adjustable therein. The grip... | 03/06/1984 |
| 4091828 | Manually operable crutch and cane stand A walking cane is provided with a collapsible stand adjacent its tip shiftable from an extended position wherein the stand supports the cane in an upright attitude, to a collapsed position wherein the stand nests neatly along the body of the cane above th... | 05/30/1978 |
