"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 |
| 6779742 | Air brush In contrast to the conventional air brush, an air brush in the invention has a function in which even a beginner can easily perform an operation for pulling an operating rod little by little while the operating rod is slightly pushed and pulled at an initial stage o... | 08/24/2004 |
| 4798336 | Control means for spraying apparatus A control mechanism is provided for use in a gas-operated spraying apparatus such as an airbrush having a needle located axially of a nozzle, the needle being retractable in the nozzle to dispense a medium, for example, paint to be sprayed. The control me... | 01/17/1989 |