Defendant
10 cases as defendant.
Microsoft Corporation is a publicly traded technology company founded by Bill Gates and Paul Allen in 1975. Headquartered in Redmond, Washington, the company is a major force in the technology industry, with a market capitalization of approximately $3.13 trillion as of May 2026. Microsoft employs over 220,000 people globally and reported revenue of $318.27 billion for the twelve months ending March 31, 2026. The company trades on the Nasdaq stock exchange under the ticker symbol MSFT.
Microsoft develops, manufactures, licenses, and supports a wide range of software products, services, and hardware devices. Its most well-known software products include the Microsoft Windows line of operating systems, the Microsoft 365 (formerly Office) suite of productivity applications (including Word, Excel, and PowerPoint), and the Edge web browser. In the enterprise and cloud computing space, Microsoft's Azure is a major cloud platform. The company's hardware offerings include the Xbox video game consoles and the Microsoft Surface line of personal computers. Microsoft also operates in social networking with its subsidiary LinkedIn and in search with its Bing search engine.
As a major technology firm, Microsoft is frequently involved in patent litigation. The provided data shows Microsoft is predominantly a defendant, a common posture for large operating companies. In the tracked cases, Microsoft has been a defendant six times and a plaintiff once. This pattern indicates that Microsoft is primarily defending its own products and technologies against infringement claims, often from non-practicing entities (NPEs) or competing companies. The lawsuits are filed in various jurisdictions, including the Western District of Texas and the District of Delaware, which are common venues for patent disputes.
The case list highlights several recent suits where Microsoft is the defendant, brought by entities such as Qomplx LLC and Monticello Enterprises LLC. The single instance of Microsoft as a plaintiff is an action before the Patent Trial and Appeal Board (PTAB), a common strategy for defendants in district court litigation to challenge the validity of the patents being asserted against them. The case involving Corel Software, LLC shows litigation can be two-way, with Microsoft defending in district court while simultaneously challenging the patent's validity at the PTAB.
The complaint alleges that a range of Microsoft's cloud data analytics and cybersecurity products infringe upon six patents, including the '628 patent. The case is in its early stages, with preliminary infringement contentions and a scheduling order filed.
The complaint alleges that Microsoft's cloud data analytics and cybersecurity products infringe on six patents, including the '627 patent. Microsoft has filed petitions for inter partes review (IPR) to challenge the validity of some of the asserted patents. The district court case is proceeding, with a trial scheduled.
This case was consolidated into the lead case 6:23-cv-753-XR and was dismissed on March 18, 2026.
Infringement suit filed by Datacloud Technologies LLC against Microsoft Corporation. The case was dismissed pursuant to a settlement agreement.
Express Mobile, Inc. filed a patent infringement suit against Microsoft Corporation in the Delaware District Court. The case was ultimately dismissed.
An older case demonstrating a longer history of litigation for the patent's owner; its current status is not definitively clear from available public dockets.
This case involved allegations that Microsoft's 'Live Preview' feature infringed on several Corel patents, including the '996 patent. The case was stayed multiple times pending the outcome of PTAB proceedings and was ultimately resolved by a summary judgment in favor of Microsoft in September 2025.
After a lengthy legal battle including a $388M jury verdict for Uniloc, the infringement judgment was ultimately vacated by the Federal Circuit in 2012.
A jury found Microsoft infringed and awarded Uniloc $388 million, but the case went through appeals where the CAFC ordered a new trial on damages. The parties reached a confidential settlement in March 2012 before the new trial could occur.
In a lawsuit filed in 2007, a jury found Microsoft's infringement of two VirnetX patents was willful and awarded $105.75 million in damages in March 2010. Following the verdict, VirnetX filed a new motion alleging infringement by newer Microsoft products.