The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2004
Filed:
Jul. 30, 1998
Krishna S. Nathan, New York, NY (US);
Eugene H. Ratzlaff, Hopewell Junction, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Systems and methods are described for concisely encoding into a lexicon (or dictionary) and decoding from the lexicon regular expressions that can represent certain huge word lists that might otherwise be considered unmanageably large. Sets of words (character sequences or 'strings') that share certain commonalities such as a set of numbers, which share common digits, may be condensed into digital lexicons by representing the set with a regular expression. The regular expression is a string that includes meta-character, where each meta-character is a place-marker that represents a set of at least two normal characters. When accessing or searching the lexicon, the regular expressions are dynamically expanded, as needed, to the underlying, original word list. The methods disclosed are applicable to many lexicon driven language based systems such as spelling verification systems, handwriting recognition systems, speech recognition systems and the like.