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The Institute of Electrical and Electronics Engineers (IEEE) annual Patent Scorecard, released in December 2008, gave Microsoft the top score among all categories. This is the second consecutive year Microsoft has topped the list.
IEEEs Patent Pipeline Power ranking takes a number of factors into account, including the number of patents held, year-over-year portfolio growth, the variety of technologies influenced and the number of times a companys patents are cited in the patent applications of other inventors.
The resulting Pipeline Power metric provides a weighted score of a companys influence on the innovation ecosystem and is a strong indication of the quality of the companys patent portfolio.
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