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:
Aug. 25, 2009
Filed:
Sep. 05, 2002
Clifford H. Wallach, Buffalo Grove, IL (US);
Clifford H. Wallach, Buffalo Grove, IL (US);
U.S. Robotics, Schaumburg, IL (US);
Abstract
An improved data compression system and method is disclosed. The data compression method uses smaller fixed bit words to represent streams of digital data. The fixed bit words are sent instead of the streams of digital data. A table relating the fixed bit words and streams of digital data is provided as a dictionary. Each entry has a node which is indexed in a stored index. As additional fixed bit words are established for new streams of digital data, older fixed bit words are deleted from the dictionary. The older fixed bit words are prevented from being deleted if they are used for subsequent streams of data. There are a number of methods to determine how the older fixed bit words are retained which are disclosed.