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"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 |
| 6926314 | Mudguard gritter A mudguard gritter that can be easily installed on trucks, school buses, delivery trucks and semitrailers. It can be fixed to supports of existing mudguards. The mudguard gritter comprises a container forming a hopper having the shape of a conventional aileron, with... | 08/09/2005 |
| 6629709 | Wheel/rail adhesion enhancement If the wheel/rail adhesion for a railway vehicle is insufficient then the wheels may slip when braking. If slipping is detected, a control system may reduce the brake pressure to permit a controlled level of slip and so to optimize the braking force for t... | 10/07/2003 |
| 4747627 | Apparatus for improving adhesion of a railway vehicle A sanding apparatus improves adhesion between a railcar wheel and a rail by supplying adhesion intensifying particles to the contact faces. Sand and/or quartz particles, having diameters such that at least 50% of the particles are 100 to 300 micrometers, ... | 05/31/1988 |
