"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 |
| 7941954 | Compact foldable handgun A handgun comprised of a frame having a barrel with a muzzle end and a breech end. A breech area is adjacent the breech end of the barrel. A slide is movable on the frame between one of a closed position and a blow-back position. An opening in the slide allows commu... | 05/17/2011 |
| 4757627 | Pistol for slaughtering animals with automatic closure by means of the trigger Pistol for slaughtering animals with captive projectile and hinged breech block, the breech block 13 being automatically locked to the breech 10 before the explosion by means of a balancing lever 37, inside the breech block, having a head 40 at one end fo... | 07/19/1988 |