"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 |
| 5178191 | Modular pneumatic control systems A fluid module for a fluid control apparatus which has an internal fluid operated diaphragm which will permit the manifolding of several modules together. Each of the modules is of the same configuration and is interconnected to a common main fluid supply... | 01/12/1993 |