Hayes & Associates

“Thank you, on behalf of the family and myself, for your guidance and aid in my preparations for trial and for your impeccable presentation and expert testimony. Your meticulous, straightforward explanation of the unexplainable was vital to our efforts.”

— Plaintiff Attorney

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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?