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U.S. Patent & Trademark Office Grants Tumbleweed A New Digital Certificate Patent


Redwood City, CA – Tumbleweed® Communications Corp. (NASDAQ:TMWD), a leading provider of email security, managed file transfer, and identity validation appliance and software products, announced that it has been granted U.S. Patent No. 7,073,056 by the U.S. Patent and Trademark Office.

The new patent, titled "Apparatus and Method for Demonstrating and Confirming the Status of Digital Certificates and Other Data” describes a method and apparatus for demonstrating and confirming the status of digital certificates and other data. The new patent is a continuation of U.S. Patent No. 6,532,540, which is itself a divisional of Patent No. 5,903,651, the application for which was filed on May 14, 1996.

Tumbleweed's patent portfolio includes 23 granted U.S. utility patents. The patent portfolio broadly covers secure communication over Internet standards.

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Control No.

Definition:
Unique number assigned to a patent reexamination request when it is filed, having a 2-digit series code for ex parte reexamination requests and a 6-digit control number.

Filing Date

Definition:
The date of receipt in the Office of an application which includes (1) a specification containing a description and, if the application is a nonprovisional application, at least one claim, and (2) any required drawings.

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