MICHEL, Circuit Judge.
This appeal requires our determination of whether a patentee submitted sufficient evidence to preclude the grant of summary judgment of invalidity due to the on-sale bar. Oral argument was heard on October 3, 2000. Because we find that the patentee raised a genuine issue of material fact as to whether its sale of a tractor truck trailer prior to the critical date of its patent was primarily experimental, and thus was not a "commercial sale"...
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