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| Number | Title | Issue Date |
| 5768616 | Apparatus for detecting electro-magnetic stylus signals by inducing current into a plurality of sensor coils using signals transmitted by the tranmitter coil of the stylus A method and apparatus for detecting the presence of a stylus relative to an active area of a display screen. The method includes the steps of providing a number of sensors which are positioned to define a boundary surrounding an active area of the displa... | 06/16/1998 |
