"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7541967 | Sounding transformation and recognition A method for scaling and converting sounding data into physical properties of a scanned medium is disclosed. In one embodiment, sounding data is received and transformed into phase space, where the phase space transformation linearizes the sounding data. The slope a... | 06/02/2009 |