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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 |
| 6169588 | Panel for a color cathode ray tube In a panel for a color cathode ray tube, an at least 10% portion in a width direction of a seal edge surface of the panel is a roughened surface which satisfies: 5 μmࣘRzࣘ30 μm, 150 μmࣘSmࣘ500 μm, and 0.015ࣘRz /S | 01/02/2001 |
| 6075581 | Liquid crystal display device including a birefringent filter and a diffractive filter for diffusing the resultant image An image display apparatus and a liquid-crystal display device using such an optical filter for diffusing pixels while suppressing the occurrence of moire. A diffuser (optical filter) 13 comprising a combination of a diffraction grating 26 and a birefring... | 06/13/2000 |
| 5300942 | High efficiency light valve projection system with decreased perception of spaces between pixels and/or hines A light valve such as an active matrix LCD between crossed polarizers, utilizing, for instance, individual transistors to control each "pixel area" of the LCD and storage elements to store video signal data for each pixel, with optically shielded "dead sp... | 04/05/1994 |
| 5005968 | Contrast decreasing apparatus in image forming optical system A contrast decreasing apparatus including an image forming device having arrays of fine picture elements which are provided between non-emission masks located in a matrix arrangement, a projecting optical device which projects the images formed by the ima... | 04/09/1991 |
| 4882776 | Image information transmitting system An image information transmitting apparatus comprises an image output unit for outputting image information, a modulation unit for pulse-frequency modulating the image information from the image output unit and a demodulation unit for demodulating the mod... | 11/21/1989 |
| 4184746 | Transmissive diffractive phase-grating A transmissive diffractive phase-grating which substantially nulls the zeroth order of the light-source or substantially nulls the undiffracted transmission of generally all frequencies of visible light and which diverts and distributes substantially all ... | 01/22/1980 |
