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:
Apr. 11, 1995
Filed:
Aug. 26, 1993
Douglas N Cogan, Brookfield, IL (US);
Burkhardt T Hufnagel, Mount Prospect, IL (US);
Yan Gu, Chicago, IL (US);
Commerce Clearing House, Riverwoods, IL (US);
Abstract
A data retrieval system using a compression scheme especially for serial transmission, which does not inadvertently generate typical flow control codes, such as ASCII values less than 32. A personal computer with a modem is used to access a remote mainframe database. Retrieved data is compressed according to the scheme and transmitted over telephone lines. Compression is achieved by encoding a compressed byte pair in place of a recurring sequence of data longer than two bytes. The byte pair contains information as to the length and offset into the transmitted packet of a previous occurrence of the recurring sequence, so that it may be copied from previously received bytes. The length and offset are stored in the byte pair such that neither byte has an ASCII value typical of those used for controlling modems.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile