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Where they've been granted
- In New Zealand, an XML patent was granted to Microsoft in 2005 for "parsing, modifying, reading, and creating the word-processor document". 
- In the USA in 2009, Microsoft was granted an XML patent (US7,571,169) for Word-processing document stored in a single XML file that may be manipulated by applications that understand XML. This was discussed on Slashdot in August 2009.
- In Costa Rica
Related pages on ESP Wiki
- i4i v. Microsoft
- Litigation and specific patents
- Tim Bray on software patents - one of the developers of XML
- Example software patents