Navigation tool

Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device

Reexamination Certificate

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Details

C345S174000, C382S124000

Reexamination Certificate

active

07129926

ABSTRACT:
This invention relates to a navigation tool for connecting to a display device, comprising at least two sensor elements having known positions relative to each other, each sensor element being coupled to detector means for recording a change in a predetermined parametre and timing means for determining the time of change at each sensor element and calculating means for calculating the direction and speed of the recorded changes based on the relative positions of the sensor elements and the duration between the recorded changes.

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patent: 6408087 (2002-06-01), Kramer
patent: 6950539 (2005-09-01), Bjorn et al.
patent: 0969477 (2000-01-01), None
patent: 0973123 (2000-01-01), None
patent: 11194863 (1999-07-01), None
patent: WO 9858342 (1998-12-01), None
patent: WO 9943258 (1999-09-01), None

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