Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
2007-09-25
2007-09-25
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C178S018090, C345S173000, C345S175000
Reexamination Certificate
active
10681330
ABSTRACT:
An apparatus for detecting a pointer within a region of interest includes a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest. The second side is joined to the first side to define a first corner. A non-reflective region generally in the plane of at least one of the first and second reflective elements is adjacent the first corner. At least one imaging device captures images of the region of interest including reflections from the first and second reflective elements.
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Booth David Kenneth
Fletcher Mark Andrew
Sirotich Roberto A. L.
Ung Chi Man Charles
Worthington Stephen
Beck Alexander S.
Katten Muchin & Rosenman LLP
Lefkowitz Sumati
Smart Technologies Inc.
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