| http://www.w3.org/ns/prov#value | - The main object of the present invention is to provide an electro-optical mouse which is pattern insensitive, i.e., can operate on virtually any substantially planar imperfect surface, especially those having a random surface pattern relatively light and dark areas separated by edges, for example a wood grained surface or any surface that is not completely monochromatic with no image imperfections
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