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:
Mar. 16, 2010
Filed:
Sep. 08, 2004
Joanna L. Kulik, Somerville, MA (US);
Joanna L. Kulik, Somerville, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
Described are techniques used in connection with subscribe and alert services as may be embodied in a subscription system. The subscription system uses a preprocessor for preprocessing subscription and notification messages prior to submission to the subscription/publication server. The preprocessor outputs a preprocessed message including one or more identifiers categorizing an input subscription or notification message. The preprocessor uses a content graph to produce the preprocessed message. The subscription system uses a content based routing system with a tree-like topology to process preprocessed subscriptions and notifications using content graphs maintained at each node in the system. Also described is a loss detection technique using sequence numbers.