USPTO確認i4i專利權

加拿大業者i4i在2007年控告微軟Word產品採用了該公司專利的客製化XML技術，2009.8.東德州法院認為微軟的確侵犯i4i專利，判決微軟必須支付US$2.9億元的賠償金額。詳見：http://km-ip.blogspot.com/2010/04/word.html

專利再審查
微軟於2008年底向USPTO提出對US5,787,449 號專利進行再審查程序申請，在美國的專利訴訟上，USPTO的再審查結果是證明專利所有權歸屬的重要判決。
USPTO於2010.4.發出再審查證書通知，確認US5,787,449號專利的專利權歸i4i所有。

US5,787,449
Title:Method and system for manipulating the architecture and the content of a document separately from each other
Filing Date:1994.6.2.
Issue Date:1998.7.28.
Abstract:
A system and method for the separate manipulation of the architecture and content of a document, particularly for data representation and transformations. The system, for use by computer software developers, removes dependency on document encoding technology. A map of metacodes found in the document is produced and provided and stored separately from the document. The map indicates the location and addresses of metacodes in the document. The system allows of multiple views of the same content, the ability to work solely on structure and solely on content, storage efficiency of multiple versions and efficiency of operation.