Telegraphy – Systems – Position coordinate determination for writing
Reexamination Certificate
2011-03-01
2011-03-01
Nguyen, Chanh (Department: 2629)
Telegraphy
Systems
Position coordinate determination for writing
Reexamination Certificate
active
07897885
ABSTRACT:
A digitizer pen includes a solar cell for converting solar power into electrical energy, an energy storing circuit connected electrically to the solar cell for storing electrical energy therefrom, a magnetic field generating circuit for receiving electrical energy from one of the solar cell and the energy storing circuit, and a pen housing unit for receiving the solar cell, the energy storing circuit and the magnetic field generating circuit.
REFERENCES:
patent: 4726044 (1988-02-01), Perna et al.
patent: 6943670 (2005-09-01), Liguori et al.
patent: 2004/0056850 (2004-03-01), Jaeger
patent: 2006/0240876 (2006-10-01), Chang
Brooks & Kushman P.C.
Nguyen Chanh
Seyoum Tsegaye
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