Vertical Computer Systems, Inc. Files Patent Infringement Lawsuit Against Microsoft Corporation

Fort Worth, TX, April 20, 2007 (PRIME NEWSWIRE)– Vertical Computer Systems, Inc. (OTCBB: VCSY)( announced today that on April 18, 2007, Vertical Computer Systems, Inc. filed suit for patent infringement against Microsoft Corp. in the United States District Court for the Eastern District of Texas. VCSY claims that the Microsoft .Net System infringes U.S. Patent No. 6,826,744.

This release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. With the exception of historical information contained herein, the matters discussed in this press release involve risk and uncertainties. Actual results could differ materially from those expressed in any forward-looking statement.


Vertical Computer Systems, Inc. (OTCBB: VCSY) is a provider of administrative software, Internet core technologies, and derivative software application products through its distribution network. VCSY's main administrative software product is emPath®, which is developed and distributed by NOW Solutions, Inc., the Company's wholly-owned subsidiary. VCSY's primary Internet core technologies include SiteFlash, ResponseFlash, NewsFlash, and the Emily XML Scripting Language, which can be used to build web services. VCSY also markets three security products that make up its security suite (ImmuneApp, StatePointPlus® and CKM®). Information on VCSY and its products can be obtained on the World Wide Web at

Vertical Computer Systems, Inc.
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