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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 |
| 5762501 | Surgical and dental procedures using laser radiation Laser radiation having a selected wavelength and in the form of pulses having a selected pulse duration, repetition rate and energy content per pulse, is employed for performing a variety of dental and medical procedures, including treatment of cysts and ... | 06/09/1998 |
| 5306143 | Dental hygiene appliance A dental hygiene appliance for brushing teeth composed of a handle; a brushing head connected to the handle and a set of tooth brushing bristles projecting in a given direction from the head; a source of monochromatic radiation having a given wavelength; ... | 04/26/1994 |
| 5292253 | Method for repairing tooth and bone tissue An opening in bone or tooth tissue is repaired by at least partially filling the opening with a calcium-containing material in a moldable state and a protein gel; and applying to the gel laser radiation in a manner to weld that material to one of the bone... | 03/08/1994 |
| 5290274 | Laser apparatus for medical and dental treatments A method and apparatus for performing a medical or dental treatment by: providing radiation at two different wavelengths and at respective power levels such that the radiation at each wavelength is individually capable of cutting a given organic tissue; s... | 03/01/1994 |
| 5273713 | Water purification and sterilization process A method of eliminating bacteria from water without resort to chemicals. The method is carried out by: mixing into the water a dye which stains bacteria contained in the water; and irradiating the water containing the dye with radiation at a wavelength wh... | 12/28/1993 |
| 5232366 | Cutting physiologic tissues A method of cutting physiologic tissue in the mouth of a patient, comprising: providing a tunable laser which is tunable to produce laser radiation at any one of at least two different wavelengths, including a first wavelength which is effective for cutti... | 08/03/1993 |
| 5194005 | Surgical and dental procedures using laser radiation Laser radiation having a selected wavelength and in the form of pulses having a selected pulse duration, repetition rate and energy content per pulse, is employed for performing a variety of dental and medical procedures, including treatment of cysts and ... | 03/16/1993 |
