Quotables
"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 |
| 4451754 | High frequency piezoelectric resonator The invention provides a piezoelectric bar resonator of small dimensions operating in the thickness shear mode and employing a minimum of separate and distinct elements. The resonating element 1 and its support 2 are blanked from a thin slab of piezoelect... | 05/29/1984 |
| 4445256 | Method of manufacturing piezoelectric resonator components An electronic component comprising at least one piezoelectric resonator and a process for mass production thereof include the superpositioning of n (nࣙ1) layers having one or several cut outs defining m (mࣙ1) resonating elements. Such layers are separ... | 05/01/1984 |
