"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 |
| 4937969 | Hydroponic system Two pipe-construction houses of a shed-roofed type, facing each other at their ridge sides with a gap provided between the ridges, are coupled with girders to make an integrated construction. The sides are covered with rollable ventilative sheets, and its... | 07/03/1990 |
| 4719935 | Portable multi-purpose tent assembly A tent-like apparatus which has a substantial portion of its roof cut out to form a roof opening. Fastener means are provided around the roof opening, and various types of inserts each having its own fastener about its peripheral edge and each being sized... | 01/19/1988 |
| 4625468 | Temporary/portable nuclear fallout shelter Significant, life-saving protection from airborne, radioactive (fallout) particles due to nuclear explosions, nuclear reactor accidents, and other releases of radioactive particulate is provided by a double-wall tent structure quickly erectable over a cen... | 12/02/1986 |
| 4236543 | Portable tent A small, lightweight tent having enhanced comfort and stability includes a flexible covering having two generally similar side walls. Two resiliently flexible pole members are held flexed by the side walls so as to hold the side walls tense and thereby sh... | 12/02/1980 |
| 3970096 | Tent The tent herein comprises outer nonporous and inner porous layers disposed in spaced relation to each other, with a continuous air passageway therebetween. Compression tent supporting means comprises a plurality of demountable, substantially, semicircular... | 07/20/1976 |
| 3960162 | Vented umbrella An umbrella having uniquely designed and located vents for the protection of its structural components when used in open spaces where winds of medium and high velocities are encountered. The vents comprise pivotal flaps fabricated of semi rigid material a... | 06/01/1976 |