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:
Feb. 03, 2004
Filed:
Apr. 28, 2000
Mark Nixon, Round Rock, TX (US);
Teresa Chatkoff, Austin, TX (US);
Stephen Gilbert, Austin, TX (US);
Fisher Rosemount Systems, Inc., Austin, TX (US);
Abstract
A configuration database includes multiple databases distributed at a plurality of physical locations within a process control system. Each of the databases may be accessed by users at any of the sites within the process control system. A database server having a shared cache accesses a database in a manner that enables multiple subscribers to read configuration data from the database with only a minimal number of reads to the database. To prevent the configuration data being viewed by subscribers within the process control system from becoming stale, the database server automatically detects changes to an item within the configuration database and sends notifications of changes made to the item the each of the subscribers of that item so that a user always views the state of the configuration as it actually exists within the configuration database.