"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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| Number | Title | Issue Date |
| 7526990 | Contact safety device A contact safety device between two mechanical parts mobile which respect to one another to guarantee the internal kinematics, by the release or activation of control means, wherein said device incorporates a safety unit connected to one of said two mechanical parts... | 05/05/2009 |