Microsoft is committed to responsible intellectual property management, including the creation of a healthy patent ecosystem around the world that promotes and encourages innovation. One component of a well-functioning patent system is clarity around what entity is the real party in interest for a particular patent. Increased transparency around ownership reduces the likelihood of opportunistic behavior and gamesmanship by patent holders and helps facilitate licensing.

To demonstrate our commitment to transparency, we have joined with other industry leaders in the Open Register of Patent Ownership, or OroPO. Through OroPO, Microsoft provides a list that includes to the best of our knowledge all issued patents that Microsoft currently owns, either directly or through subsidiaries. This project builds on our Patent Tracker tool, first established in March 2013, which included a full listing of worldwide issued patents that Microsoft has filed and prosecuted, as well as patents that we have acquired over time.

Microsoft generates the list of patent numbers. Please note that the list may not include all acquired patents as of the date of posting, as the process of completing our intake of acquired patents takes some time. For more information, visit the FAQ page.

As Microsoft realigns its core functions we are also realigning our licensing and legal support by forming Microsoft Technology Licensing, LLC. Continuing Microsoft's commitment to transparency, Microsoft Technology Licensing, LLC will continue to make every patent it holds publicly available via the patent tracker.

This is a reorganization to ensure the appropriate support to business groups and streamline the management of the Microsoft patent assets. This business decision does not change the company's IP commitments or approach to litigation as a last resort. Our commitments to partners, regulators, and standards organizations will not be impacted. Microsoft and its subsidiaries remain committed to responsible intellectual property management.

You can find more information about the patents in the list in a variety of places. For a US patent, start at the US Patent and Trademark Office's general Patent Search home page and navigate to their Full-Text and Image Database, or view additional information using Public PAIR. A good resource for patents from many countries is the European Patent Office's Espacenet Patent Search site (which includes a training course). For more information about a patent from another country, contact or visit the website of the patent-granting authority in that location.

As Microsoft joined OroPO in May 2015, all future updates to our patent listings will be made on the OroPO Database of Assigned Patents.

Patent Tracker Tool

The patent tracker tool permits a search of the list to be performed. The search can be directed to US or international portions of the portfolio, or to any individual country. Alternately, the list may be searched by patent number, title, or assignee of record.

List of Patents

Also provided is a link to a downloadable copy of the list in a platform-independent "comma-separated values" (CSV) format. This file can be downloaded, manipulated, and viewed in any application that can display text.

The Patent Tracker list and tool were last updated on 12/11/2014.

Patent Tracker

Patent Number

Patent Title



Instructions Accompanying Link

Provided here is a link to a file containing the list of Microsoft-owned patents in a platform-independent "comma-separated values" (CSV) format.

This file can be downloaded, manipulated, and viewed in any application that can display text. To filter or search using the file, open it in an application that can interpret CSV data, e.g., Microsoft Excel or OpenOffice. If using Excel, double-click the downloaded file to open it in Excel. Then, use Excel's "Format as Table" functionality to automatically create a table with sortable and filterable columns.