1. A method for identifying products potentially infringing a patent, the method comprising: determining frequencies of occurrence within the text of the patent of each word of a plurality of words in a claim of the patent to obtain a plurality of first frequencies; determining frequencies of occurrence of said each word in a neutral text unrelated to the patent and to technology of the patent to obtain a plurality of second frequencies; for said each word, calculating a ratio of the first frequency associated with said each word to the second frequency associated with said each word, thereby obtaining a plurality of ratios, a ratio of the plurality of ratios per said each word; comparing each ratio of the plurality of ratios to a first parameter to obtain a plurality of key terms, each key term of the plurality of key terms comprising a word corresponding to a ratio of the plurality of ratios that exceeds the first parameter; formulating at least one query to search for data items that include the key terms; launching the at least one query; receiving search results responsive to the at least one query; and organizing the search results according to a criterion of relevance to the patent, thereby obtaining organized search results; and outputting the organized search results.