Eolas Tech Inc v. Microsoft Corp

Court

District Court, N.D. Illinois (N.D. Ill.)
Official Court Website →

Assigned judge

Rebecca R. Pallmeyer · 6,662 cases in index

Docket number

1:99-cv-00626

Cause

35:145 Patent Infringement
35 U.S.C. § 145

Nature of suit

830 Patent
Infringement of a patented invention.

Jurisdiction

Federal Question

Jury demand

Both

Date filed

02/02/1999

Date terminated

09/13/2007

5,157 Patent cases in this court are indexed here.

Parties

• plaintiff · Eolas Tech Inc
• defendant · Microsoft Corp
• defendant · Microsoft Corporation Cybersecurity · 1819 cases

Part of a Larger Litigation Pattern

This is one of 1,820 Patent cases in our index naming Microsoft Corporation — a possible mass-tort or coordinated-litigation cluster.

• Massachusetts Institute of Technology v. Microsoft Corporation
  District Court, E.D. TexasFiled 05/15/2026
• Academia Sinica v. Microsoft Corporation
  District Court, E.D. TexasFiled 05/14/2026
• Algebraix LLC v. Microsoft Corporation
  District Court, E.D. TexasFiled 05/08/2026
• Vl Collective Ip LLC v. Microsoft Corporation
  District Court, E.D. TexasFiled 04/29/2026
• Roots Informatics LP v. Microsoft Corporation
  District Court, S.D. New YorkFiled 01/22/2026
• Entelekon LLC v. Microsoft Corporation
  District Court, W.D. TexasFiled 01/22/2026

About Patent Lawsuits

Patent lawsuits allege infringement of a patented invention — that another party made, used, or sold a protected technology without authorization. These cases are common in technology and pharmaceutical industries.

Frequently Asked Questions

What is Eolas Tech Inc v. Microsoft Corp?

Eolas Tech Inc v. Microsoft Corp is a federal patent lawsuit filed on 02/02/1999 in the District Court, N.D. Illinois. The case was terminated on 09/13/2007. Patent lawsuits allege infringement of a patented invention — that another party made, used, or sold a protected technology without authorization. These cases are common in technology and pharmaceutical industries.

What type of case is this?

It is classified as “Patent” under the federal nature-of-suit system. Patent lawsuits allege infringement of a patented invention — that another party made, used, or sold a protected technology without authorization. These cases are common in technology and pharmaceutical industries.

What court is the case in?

The case is in the District Court, N.D. Illinois, docket number 1:99-cv-00626.

When was the case filed?

Eolas Tech Inc v. Microsoft Corp was filed on 02/02/1999. It was terminated on 09/13/2007.

What law is the case brought under?

The docket lists the cause as 35 U.S.C. § 145.