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"Radio has no future."
Lord Kelvin, British mathematician and physicist ; 1897
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| Number | Title | Issue Date |
| 7292695 | Bone conductive speaker A bone conductive speaker is downsized without causing any loss in efficiency, simple in construction low in cost, and comprises yoke (2), magnet (3) disposed in a central area of the yoke, and voice coil (4) wound on the magnet. The yoke has it... | 11/06/2007 |
| 7181191 | Outlet tap, power source cut-off system, and power source cut-off method A power source cut-off system enabling the user to cut off power supply from an outlet even when user is out comprises an outlet tap for supplying power to an electric apparatus by connecting it to a home commercial power source and a telephone set for controlling t... | 02/20/2007 |
| 6272227 | Simultaneous two-way communication apparatus using ear microphone The apparatus eliminates howls to permit a received sound to increase in sound volume to enable the apparatus to be used in high-noise areas, and comprises: a transceived sound volume control circuit 10 for controlling in sound volume a transceived sound,... | 08/07/2001 |
