Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-11-18
2010-02-02
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S221000
Reexamination Certificate
active
07655901
ABSTRACT:
A mobile communication device having a keyboard with a set of keys representing alpha-numeric characters, the keyboard comprising a light source, located within said mobile communication device; for providing a light; a set of sensors, associated with said keys, for sensing an amount of said light in a vicinity of each of said set of sensors, to determine which of said set of keys has been selected; and a transparent flat cover, overlying said set of sensors, displaying said set of alpha-numeric characters, for associating said set of alpha-numeric characters with said set of sensors.
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Canadian Intellectual Property Office, Office Action for Canadian Patent Application No. 2568380, Sep. 8, 2009.
Idzik Jacek S.
Lowles Robert J.
Borden Ladner Gervais LLP
Bui-Pho Pascal M
Epps Georgia Y
Research in Motion Limited
Wong Jeffrey W.
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