Hayes & Associates

“The ABSOLUTE BEST with whom I have worked in 30 years. Dr. Hayes is superbly qualified and talks right on the same level with a jury.”

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What We Do: Case Examples

Patent Validity / Infringement

Patent Validity/Infringement: Bipolar Hip Arthroplasty

Bipolar hip arthroplasty was originally conceived as a way to reduce shear stresses on acetablular cartilage by the inclusion of a low-friction inner bearing in a unipolar design. Because of this compound bearing surface, the bipolar was thought to improve on both unipolar and conventional total hip replacements. Patent litigation raised issues of validity and infringement related to the early bipolar patents. *Were the early bipolar hip patents valid and enforceable? *Were their claims infringed by subsequent devices?

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