"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Application No. | Application Title | Issue Date |
| 20100033855 | OPTICAL INSTRUMENT COMPRISING AN ENTRANCE CAVITY IN WHICH A MIRROR IS PLACED The invention relates to an optical instrument (1) comprising at least one mirror called the primary mirror (3), placed in a cavity (2) and comprising an active face capable of being subjected to instantaneous variations of the incident radiative fl... | 02/11/2010 |