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We are a national defense litigation law firm.

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Deasey, Mahoney & Valentini is a well-established national defense litigation law firm headquartered in Philadelphia.

Our clients benefit from our litigators’ collective experience in a variety of practice areas. For each matter they handle, senior litigators provide personal attention during all phases of representation and deliver exceptional, responsive service at a reasonable cost. 

In short, our attorneys strive to craft and deliver a superior product.

Class Action

The attorneys of Deasey, Mahoney & Valentini are litigation specialists with ample experience including complex class action and mass tort matters. Whether your organization is facing a product liability (products liability), employment discrimination, consumer finance, toxic tort, environmental, insurance coverage, commercial or other class action lawsuit, our litigators are prepared to provide aggressive representation in state or federal courts nationwide.

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Matthews v. Anthony’s Landscaping and Tree Company

On December 16, 2019, the Honorable Messiah Jackson of the Philadelphia Court of Common Pleas entered summary judgment in favor of Anthony’s Tree and Landscaping Company in a negligence action based upon Anthony’s Tree and Landscaping’s work performed on a tree located on a Prospect...

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