48. The article of manufacture of claim 37 , wherein the code causes the processor, in the course of performing the step of formulating at least one query, to perform the step of formulating a plurality of queries.
37. An article of manufacture comprising a machine-readable storage medium with instruction code stored in the medium, said instruction code, when executed by a data processing system comprising a processor, causes the processor to perform the following steps to identify products potentially infringing a patent: receiving an identifier of the patent; retrieving text of the patent; parsing the text of the patent to identify claims section of the text of the patent; parsing the claims section to identify one or more individual claims of the patent; parsing the individual claims of the patent to identify one or more independent claims of the patent, the one or more independent claims comprising a first independent claim; identifying a preamble of the first independent claim; identifying one or more limitations of the first independent claim; identifying one or more key terms for each limitation of the one or more limitations; formulating at least one query to search for data items that include the key terms of the one or more limitations of the first independent claim; launching the at least one query; receiving search results responsive to the at least one query; and reviewing the search results of the query; wherein the code causes the processor, in the course of performing the step of identifying one or more key terms, to perform steps comprising: for each word of a plurality of words in the one or more limitations, calculating a ratio of (1) frequency of occurrence within the text of the patent of said each word to (2) frequency of occurrence of said each word in a neutral text not related to the patent or to technology of the patent, thereby obtaining a plurality of ratios, each ratio of the plurality of ratios corresponding to a different said each word; comparing each ratio of the plurality of ratios to a first predetermined parameter to obtain a plurality of key terms, a key term being a word of the plurality of words corresponding to a ratio of the plurality of ratios that exceeds the first predetermined parameter.