"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 |
| 6439956 | RC car device A transmitter together with appropriate software are configured in the shape and form of a remote control unit for use with a handheld game player device. The transmitter may use a conventional radio frequency link to transmit commands to a radio controll... | 08/27/2002 |
| 5628620 | Main rotor system for helicopters A main rotor is provided for use in a rotary winged model aircraft. The main rotor includes a rotor hub assembly rotatable about a vertical axis and at least two main rotor blades. Each of the main rotor blades extends in a radial direction from the rotor... | 05/13/1997 |