"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 |
| 4876534 | Scanning method and apparatus for current signals having large dynamic range There is disclosed herein apparatus and a method for scanning information off a processing plane where the information is contained in a current signal having a very small amplitude and which can change signs and vary in amplitude by as much as five order... | 10/24/1989 |